ACT Pronouns and Possessives: Agreement, Case, Ambiguity, Apostrophes, and Who/Whom

Master ACT pronoun and possessive questions: antecedent agreement, ambiguity, pronoun case, who vs whom, its vs it's, their/there/they're, and possessive apostrophes.

Reviewed by Aakash S. · Cornell University '14 · Counselling Advisor, World ViralPublished 29 September 2026Last updated 29 September 2026

ACT pronoun questions test several different rules that students often mix together.

A pronoun must be:

clear about what it refers to;
consistent with its antecedent in number and person;
in the correct case;
grammatically distinct from a possessive or contraction.

The fastest way to solve them is not to ask:

Which pronoun sounds natural?

Ask:

What noun does this pronoun replace, and what job is the pronoun doing?

That one question organizes most of the topic.

Pronoun and antecedent

The antecedent is the noun the pronoun refers to.

The students submitted their reports.

Pronoun:

their

Antecedent:

students

Plural agrees with plural.

Wrong:

The students submitted his or her reports.

The number/meaning does not fit the plural subject in ordinary context.

Agreement in number

Singular antecedent:

The committee submitted its report.

Plural antecedent:

The committees submitted their reports.

Do not let another nearby noun steal the relationship.

The collection of paintings lost its catalog.

Antecedent:

collection

Not:

paintings.

Pronoun agreement can cross clauses

Maya spoke with the engineers because they had designed the system.

they refers to:

engineers.

But:

Maya spoke with Elena because she had designed the system.

Now she could refer to either Maya or Elena unless context resolves it.

Agreement is necessary, but clarity matters too.

Ambiguous pronouns

Wrong:

When Lena met Priya after the lecture, she was already tired.

Who was tired?

Lena?
Priya?

The sentence does not make that clear.

Better:

When Lena met Priya after the lecture, Priya was already tired.

A repeated noun can be better than an ambiguous pronoun.

ACT does not reward concision when it destroys clarity.

"This," "that," and "which" can be vague

Vague:

The city raised parking fees, which angered residents.

What angered them? Probably the fee increase.

This sentence may be acceptable if the reference is clear.

But:

The company changed its packaging and lowered its price, which increased sales.

What increased sales?

packaging change?
lower price?
both?

ACT can prefer a revision naming the cause.

Pronoun person consistency

Do not shift unnecessarily between:

one;
you;
they;
we.

Wrong:

If a student wants to improve, you should review mistakes carefully.

The sentence begins:

a student

Then shifts:

you.

Better:

If students want to improve, they should review mistakes carefully.

Or:

If you want to improve, you should review mistakes carefully.

Pronoun number consistency

Wrong:

Each participant recorded their result.

In contemporary usage, singular they is widely accepted in many contexts, but standardized-test questions can be written so that a more explicitly consistent structure is preferable.

A cleaner ACT-style rewrite may be:

All participants recorded their results.

or:

Each participant recorded a result.

Focus on the exact options and current standard usage rather than memorizing an outdated blanket rule.

Subjective vs objective case

Subject pronouns:

I;
he;
she;
we;
they;
who.

Object pronouns:

me;
him;
her;
us;
them;
whom.

Use subject form when the pronoun performs the verb.

Maya and I presented.

Use object form after a verb or preposition.

The professor thanked Maya and me.

The remove-the-other-person test

Sentence:

The award was given to Priya and I/me.

Remove Priya:

The award was given to I.

Wrong.

The award was given to me.

Correct.

So:

Priya and me.

This test is extremely useful on ACT English.

Compound subjects

Elena and I completed the experiment.

Remove Elena:

I completed the experiment.

Correct.

Not:

Me completed the experiment.

Therefore:

Elena and I.

"Between you and me"

After preposition between, use object case:

between you and me

Not:

between you and I.

The phrase may sound formal in the wrong version, but grammar controls it.

Who vs whom

Treat:

who like he/she/they;
whom like him/her/them.

Example:

Who led the project?

Answer:

She led the project.

So:

who.

Now:

Whom did the committee select?

Answer:

The committee selected her.

So:

whom.

The he/him substitution test

If:

he

fits, choose:

who.

If:

him

fits, choose:

whom.

Example:

The engineer ___ the committee hired later became director.

Rearrange:

The committee hired him.

So:

whom

Prepositions often signal whom

To whom should the report be sent?

After:

to

object form:

whom.

But do not choose whom just because the sentence sounds formal.

Always test grammatical role.

Who in a relative clause

The scientist who discovered the error revised the report.

Within clause:

who discovered the error

who is subject of:

discovered.

So subject case is correct.

Whom in a relative clause

The scientist whom the committee selected received the award.

Within clause:

the committee selected whom

whom is object.

Possessive nouns vs contractions

Apostrophes often test possession.

Singular possession:

the scientist's notebook

One scientist owns notebook.

Plural possession:

the scientists' notebooks

Multiple scientists own notebooks.

Irregular plural possession:

the children's books

children is already plural, so add:

's.

Its vs it's

This is one of the most common punctuation/usage traps.

its = possessive

it's = it is / it has

Example:

The company changed its policy.

Possession.

It's difficult to measure the effect.

= It is difficult.

Use the expansion test

Whenever you see:

it's

replace with:

it is

or:

it has.

If the sentence still works, contraction may be correct.

Example:

The machine lost it's power.

Expand:

The machine lost it is power.

Nonsense.

Correct:

its power.

Their / there / they're

their

possessive:

their results

there

location/existence:

over there
there are three options

they're

contraction:

they are

ACT can place these inside complex sentences, but the distinction remains simple.

Your / you're

your

possessive:

your calculator

you're

you are

Expansion test:

You're ready.

= You are ready.

Whose / who's

whose

possessive:

the scientist whose paper won the award

who's

who is / who has

Example:

Who's presenting today?

= Who is presenting?

Possessive pronouns do not use apostrophes

Correct:

its;
hers;
ours;
yours;
theirs.

Not:

her's;
our's;
your's;
their's.

Apostrophes do not mark possession in possessive pronouns.

Apostrophe placement with singular nouns

the student's notebook

One student.

Apostrophe placement with regular plural nouns

the students' notebooks

Multiple students.

Apostrophe placement with irregular plurals

the women's team

the children's books

Irregular plural does not end in s, so add:

's.

Joint possession

Maya and Elena's project

Usually means:

one project jointly owned by both.

Separate possession:

Maya's and Elena's projects

Usually means:

separate projects belonging to each.

ACT can test whether the sentence means joint or separate ownership.

Possession with compound nouns

my sister-in-law's car

Apostrophe attaches to the end of the compound noun.

Do not insert it inside:

sister's-in-law.

Pronoun antecedent and number

Wrong:

The company told its employees that it should update their passwords.

What is it? Company?

But who should update passwords? Employees.

Better:

The company told its employees that they should update their passwords.

Antecedent:

employees.

Pronoun ambiguity after two same-gender nouns

Elena told Maria that her application was complete.

Whose application?

Possibly:

Elena's;
Maria's.

Better:

Elena told Maria that Maria's application was complete.

Repeat the noun.

Clarity beats elegance.

Pronoun reference to an entire idea

Sentence:

The laboratory lost power during the trial. This caused the data recorder to shut down.

This refers to:

the power loss.

Often clear.

But ACT may prefer:

The power loss caused...

when the previous sentence contains multiple possible referents.

Relative pronouns: that vs which

General ACT-style distinction:

that

often introduces essential/restrictive information.

The samples that were contaminated were discarded.

Only contaminated samples.

which

often introduces nonessential information with commas.

The samples, which were stored overnight, were analyzed in the morning.

All samples were stored overnight; extra information.

Punctuation and meaning interact.

Who vs that for people

Formal standard usage often prefers:

the researcher who...

rather than:

the researcher that...

ACT choices may reward the more idiomatic relative pronoun depending on context.

Pronouns inside comparisons

Maya is taller than I/me.

The choice depends on implied grammar.

Formal full version:

Maya is taller than I am.

So:

I.

But:

The coach selected Maya rather than me.

Object:

me.

Do not choose based on what sounds more formal.

Pronoun case after forms of "be"

Traditional formal grammar can prefer subject complement forms:

It was I.

But ordinary modern usage often uses:

It was me.

ACT questions generally avoid requiring highly artificial constructions without contextual support. Focus on unambiguous subject/object roles where the rule is stable.

Worked example 1: agreement

The committee announced that ___ would publish the report Friday.

Antecedent:

committee

If treated as one unit:

Worked example 2: ambiguity

When Maya called Elena, she was driving.

Ambiguous.

Better:

When Maya called Elena, Elena was driving.

Worked example 3: case

The professor invited Daniel and ___ to the meeting.

Remove Daniel:

invited me.

Worked example 4: who/whom

The researcher ___ the board selected will lead the project.

Board selected:

him/her.

whom

Worked example 5: its/it's

The device automatically adjusts ___ settings.

Possession.

its

Worked example 6: plural possessive

The two researchers compared the ___ notes.

Notes belonging to both researchers individually/collectively:

researchers' notes

Pronouns and subject-verb agreement

These topics overlap.

Each of the students has submitted a form.

Subject:

each

Singular verb:

has.

A later pronoun may require a rewrite for clarity/consistency.

See ACT Subject-Verb Agreement.

Pronouns and modifiers

Relative pronouns can introduce modifiers:

the engineer who designed the bridge

See ACT Modifiers.

Possessives and punctuation

Apostrophes are punctuation marks, but possession requires grammatical analysis, not just visual pattern matching.

See ACT Punctuation Rules.

Pronouns and parallelism

Wrong:

The program helps students develop their writing, speaking clearly, and to improve research skills.

Pronouns may be fine, but list structure is not.

See ACT Parallelism.

The fastest ACT pronoun routine

Step 1

Circle the pronoun mentally.

Step 2

Find its antecedent.

Step 3

Check:

clear?
singular/plural?
person consistent?

Step 4

Ask its grammatical job:

subject?
object?
possessive?

Step 5

Use expansion tests for contractions.

This prevents different pronoun rules from blending together.

The fastest ACT possessive routine

Ask:

Is this word showing ownership or forming a contraction?

If contraction:

expand it.

If ownership:

identify owner;
singular or plural?
place apostrophe correctly.

Example:

the teachers lounge

Who owns lounge?

teachers, plural.

Correct:

teachers' lounge.

Common ACT pronoun traps

Trap 1: grammatically matching but ambiguous

she could refer to two people.

Trap 2: number mismatch

plural antecedent with singular pronoun.

Trap 3: person shift

students → you.

Trap 4: formal-sounding wrong case

between you and I.

Trap 5: apostrophe = possession assumption

it's is not possessive.

Trap 6: who/whom by sound

Use he/him test.

Trap 7: unnecessary pronoun

Sometimes repeating the noun is clearer.

Harder example: pronoun across sentences

The researchers presented the proposal to the committee. They requested several revisions.

Who requested revisions?

Could be:

researchers;
committee.

Ambiguous.

Better:

The committee requested several revisions.

Harder example: antecedent buried in phrase

The collection of documents was moved because it had been exposed to moisture.

it:

collection.

Not:

documents.

Singular antecedent.

Harder example: possession and contraction

The company said ___ expanding ___ research program.

Need:

it is expanding its research program.

Correct:

The company said it's expanding its research program.

Two similar-looking forms doing different jobs.

Current ACT English context

ACT's current English standards explicitly include:

pronoun-antecedent agreement;
vague and ambiguous pronouns;
pronoun person;
reflexive pronouns;
possessive pronouns such as its and your;
who/whom usage;
possessive punctuation.

These sit within Conventions of Standard English, which currently represents roughly 38–43% of enhanced ACT English reporting content.

Practice set

1

The engineers checked the device because they suspected a loose connection.

Antecedent:

engineers.

Clear.

2

Priya told Lena that she had won.

Ambiguous.

Revise by naming winner.

3

The coach spoke to Elena and I/me.

Object after:

spoke to.

4

The robot lost its/it's balance.

Possession:

its

5

The scientist who/whom discovered the species published the paper.

Subject of:

discovered.

who

6

The scientist who/whom the university hired published the paper.

University hired:

him/her.

whom

How to review pronoun mistakes

Bad note:

pronoun error.

Better:

I used "she" even though two female antecedents were equally plausible.

Or:

I chose "I" after a preposition because it sounded formal.

Or:

I treated "it's" as possessive instead of expanding it to "it is."

FAQ: ACT pronouns and possessives

What is an antecedent?

The noun a pronoun refers to.

What is the biggest pronoun trap?

Ambiguous reference—when a pronoun could refer to more than one noun.

How do I choose I vs me?

Remove the other noun and test whether the pronoun acts as subject or object.

How do I choose who vs whom?

Use he/him: he → who; him → whom.

Is "it's" possessive?

No. It's = it is / it has. Its = possessive.

Do possessive pronouns use apostrophes?

No: its, hers, ours, yours, theirs.

How do plural possessives work?

Regular plural ending in s usually takes an apostrophe after the s: students' projects.

Final takeaway

Pronoun questions become manageable when you separate the decisions.

antecedent → clarity → agreement → case

For possessives:

ownership or contraction?

Do not choose by sound or formality.

Identify the grammatical relationship first.

Official ACT references:
https://www.act.org/content/act/en/products-and-services/the-act/test-preparation/act-exam-sections-and-structure.html
https://www.act.org/content/act/en/college-and-career-readiness/standards/english-standards.html
https://www.act.org/content/dam/act/unsecured/documents/R2519-Design-Framework-for-the-ACT-Enhancements-2026-02.pdf

Trademark note: ACT® is a registered trademark of ACT Education Corp. MastaPrep is independent and is not affiliated with or endorsed by ACT Education Corp.

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ACT Pronouns and Possessives: Agreement, Case, Ambiguity, Apostrophes, and Who/Whom

Master ACT pronoun and possessive questions: antecedent agreement, ambiguity, pronoun case, who vs whom, its vs it's, their/there/they're, and possessive apostrophes.

Reviewed by Aakash S. · Cornell University '14 · Counselling Advisor, World ViralPublished 29 September 2026Last updated 29 September 2026

ACT pronoun questions test several different rules that students often mix together.

A pronoun must be:

clear about what it refers to;
consistent with its antecedent in number and person;
in the correct case;
grammatically distinct from a possessive or contraction.

The fastest way to solve them is not to ask:

Which pronoun sounds natural?

Ask:

What noun does this pronoun replace, and what job is the pronoun doing?

That one question organizes most of the topic.

Pronoun and antecedent

The antecedent is the noun the pronoun refers to.

The students submitted their reports.

Pronoun:

their

Antecedent:

students

Plural agrees with plural.

Wrong:

The students submitted his or her reports.

The number/meaning does not fit the plural subject in ordinary context.

Agreement in number

Singular antecedent:

The committee submitted its report.

Plural antecedent:

The committees submitted their reports.

Do not let another nearby noun steal the relationship.

The collection of paintings lost its catalog.

Antecedent:

collection

Not:

paintings.

Pronoun agreement can cross clauses

Maya spoke with the engineers because they had designed the system.

they refers to:

engineers.

But:

Maya spoke with Elena because she had designed the system.

Now she could refer to either Maya or Elena unless context resolves it.

Agreement is necessary, but clarity matters too.

Ambiguous pronouns

Wrong:

When Lena met Priya after the lecture, she was already tired.

Who was tired?

Lena?
Priya?

The sentence does not make that clear.

Better:

When Lena met Priya after the lecture, Priya was already tired.

A repeated noun can be better than an ambiguous pronoun.

ACT does not reward concision when it destroys clarity.

"This," "that," and "which" can be vague

Vague:

The city raised parking fees, which angered residents.

What angered them? Probably the fee increase.

This sentence may be acceptable if the reference is clear.

But:

The company changed its packaging and lowered its price, which increased sales.

What increased sales?

packaging change?
lower price?
both?

ACT can prefer a revision naming the cause.

Pronoun person consistency

Do not shift unnecessarily between:

one;
you;
they;
we.

Wrong:

If a student wants to improve, you should review mistakes carefully.

The sentence begins:

a student

Then shifts:

you.

Better:

If students want to improve, they should review mistakes carefully.

Or:

If you want to improve, you should review mistakes carefully.

Pronoun number consistency

Wrong:

Each participant recorded their result.

In contemporary usage, singular they is widely accepted in many contexts, but standardized-test questions can be written so that a more explicitly consistent structure is preferable.

A cleaner ACT-style rewrite may be:

All participants recorded their results.

or:

Each participant recorded a result.

Focus on the exact options and current standard usage rather than memorizing an outdated blanket rule.

Subjective vs objective case

Subject pronouns:

I;
he;
she;
we;
they;
who.

Object pronouns:

me;
him;
her;
us;
them;
whom.

Use subject form when the pronoun performs the verb.

Maya and I presented.

Use object form after a verb or preposition.

The professor thanked Maya and me.

The remove-the-other-person test

Sentence:

The award was given to Priya and I/me.

Remove Priya:

The award was given to I.

Wrong.

The award was given to me.

Correct.

So:

Priya and me.

This test is extremely useful on ACT English.

Compound subjects

Elena and I completed the experiment.

Remove Elena:

I completed the experiment.

Correct.

Not:

Me completed the experiment.

Therefore:

Elena and I.

"Between you and me"

After preposition between, use object case:

between you and me

Not:

between you and I.

The phrase may sound formal in the wrong version, but grammar controls it.

Who vs whom

Treat:

who like he/she/they;
whom like him/her/them.

Example:

Who led the project?

Answer:

She led the project.

So:

who.

Now:

Whom did the committee select?

Answer:

The committee selected her.

So:

whom.

The he/him substitution test

If:

he

fits, choose:

who.

If:

him

fits, choose:

whom.

Example:

The engineer ___ the committee hired later became director.

Rearrange:

The committee hired him.

So:

whom

Prepositions often signal whom

To whom should the report be sent?

After:

to

object form:

whom.

But do not choose whom just because the sentence sounds formal.

Always test grammatical role.

Who in a relative clause

The scientist who discovered the error revised the report.

Within clause:

who discovered the error

who is subject of:

discovered.

So subject case is correct.

Whom in a relative clause

The scientist whom the committee selected received the award.

Within clause:

the committee selected whom

whom is object.

Possessive nouns vs contractions

Apostrophes often test possession.

Singular possession:

the scientist's notebook

One scientist owns notebook.

Plural possession:

the scientists' notebooks

Multiple scientists own notebooks.

Irregular plural possession:

the children's books

children is already plural, so add:

's.

Its vs it's

This is one of the most common punctuation/usage traps.

its = possessive

it's = it is / it has

Example:

The company changed its policy.

Possession.

It's difficult to measure the effect.

= It is difficult.

Use the expansion test

Whenever you see:

it's

replace with:

it is

or:

it has.

If the sentence still works, contraction may be correct.

Example:

The machine lost it's power.

Expand:

The machine lost it is power.

Nonsense.

Correct:

its power.

Their / there / they're

their

possessive:

their results

there

location/existence:

over there
there are three options

they're

contraction:

they are

ACT can place these inside complex sentences, but the distinction remains simple.

Your / you're

your

possessive:

your calculator

you're

you are

Expansion test:

You're ready.

= You are ready.

Whose / who's

whose

possessive:

the scientist whose paper won the award

who's

who is / who has

Example:

Who's presenting today?

= Who is presenting?

Possessive pronouns do not use apostrophes

Correct:

its;
hers;
ours;
yours;
theirs.

Not:

her's;
our's;
your's;
their's.

Apostrophes do not mark possession in possessive pronouns.

Apostrophe placement with singular nouns

the student's notebook

One student.

Apostrophe placement with regular plural nouns

the students' notebooks

Multiple students.

Apostrophe placement with irregular plurals

the women's team

the children's books

Irregular plural does not end in s, so add:

's.

Joint possession

Maya and Elena's project

Usually means:

one project jointly owned by both.

Separate possession:

Maya's and Elena's projects

Usually means:

separate projects belonging to each.

ACT can test whether the sentence means joint or separate ownership.

Possession with compound nouns

my sister-in-law's car

Apostrophe attaches to the end of the compound noun.

Do not insert it inside:

sister's-in-law.

Pronoun antecedent and number

Wrong:

The company told its employees that it should update their passwords.

What is it? Company?

But who should update passwords? Employees.

Better:

The company told its employees that they should update their passwords.

Antecedent:

employees.

Pronoun ambiguity after two same-gender nouns

Elena told Maria that her application was complete.

Whose application?

Possibly:

Elena's;
Maria's.

Better:

Elena told Maria that Maria's application was complete.

Repeat the noun.

Clarity beats elegance.

Pronoun reference to an entire idea

Sentence:

The laboratory lost power during the trial. This caused the data recorder to shut down.

This refers to:

the power loss.

Often clear.

But ACT may prefer:

The power loss caused...

when the previous sentence contains multiple possible referents.

Relative pronouns: that vs which

General ACT-style distinction:

that

often introduces essential/restrictive information.

The samples that were contaminated were discarded.

Only contaminated samples.

which

often introduces nonessential information with commas.

The samples, which were stored overnight, were analyzed in the morning.

All samples were stored overnight; extra information.

Punctuation and meaning interact.

Who vs that for people

Formal standard usage often prefers:

the researcher who...

rather than:

the researcher that...

ACT choices may reward the more idiomatic relative pronoun depending on context.

Pronouns inside comparisons

Maya is taller than I/me.

The choice depends on implied grammar.

Formal full version:

Maya is taller than I am.

So:

I.

But:

The coach selected Maya rather than me.

Object:

me.

Do not choose based on what sounds more formal.

Pronoun case after forms of "be"

Traditional formal grammar can prefer subject complement forms:

It was I.

But ordinary modern usage often uses:

It was me.

ACT questions generally avoid requiring highly artificial constructions without contextual support. Focus on unambiguous subject/object roles where the rule is stable.

Worked example 1: agreement

The committee announced that ___ would publish the report Friday.

Antecedent:

committee

If treated as one unit:

Worked example 2: ambiguity

When Maya called Elena, she was driving.

Ambiguous.

Better:

When Maya called Elena, Elena was driving.

Worked example 3: case

The professor invited Daniel and ___ to the meeting.

Remove Daniel:

invited me.

Worked example 4: who/whom

The researcher ___ the board selected will lead the project.

Board selected:

him/her.

whom

Worked example 5: its/it's

The device automatically adjusts ___ settings.

Possession.

its

Worked example 6: plural possessive

The two researchers compared the ___ notes.

Notes belonging to both researchers individually/collectively:

researchers' notes

Pronouns and subject-verb agreement

These topics overlap.

Each of the students has submitted a form.

Subject:

each

Singular verb:

has.

A later pronoun may require a rewrite for clarity/consistency.

See ACT Subject-Verb Agreement.

Pronouns and modifiers

Relative pronouns can introduce modifiers:

the engineer who designed the bridge

See ACT Modifiers.

Possessives and punctuation

Apostrophes are punctuation marks, but possession requires grammatical analysis, not just visual pattern matching.

See ACT Punctuation Rules.

Pronouns and parallelism

Wrong:

The program helps students develop their writing, speaking clearly, and to improve research skills.

Pronouns may be fine, but list structure is not.

See ACT Parallelism.

The fastest ACT pronoun routine

Step 1

Circle the pronoun mentally.

Step 2

Find its antecedent.

Step 3

Check:

clear?
singular/plural?
person consistent?

Step 4

Ask its grammatical job:

subject?
object?
possessive?

Step 5

Use expansion tests for contractions.

This prevents different pronoun rules from blending together.

The fastest ACT possessive routine

Ask:

Is this word showing ownership or forming a contraction?

If contraction:

expand it.

If ownership:

identify owner;
singular or plural?
place apostrophe correctly.

Example:

the teachers lounge

Who owns lounge?

teachers, plural.

Correct:

teachers' lounge.

Common ACT pronoun traps

Trap 1: grammatically matching but ambiguous

she could refer to two people.

Trap 2: number mismatch

plural antecedent with singular pronoun.

Trap 3: person shift

students → you.

Trap 4: formal-sounding wrong case

between you and I.

Trap 5: apostrophe = possession assumption

it's is not possessive.

Trap 6: who/whom by sound

Use he/him test.

Trap 7: unnecessary pronoun

Sometimes repeating the noun is clearer.

Harder example: pronoun across sentences

The researchers presented the proposal to the committee. They requested several revisions.

Who requested revisions?

Could be:

researchers;
committee.

Ambiguous.

Better:

The committee requested several revisions.

Harder example: antecedent buried in phrase

The collection of documents was moved because it had been exposed to moisture.

it:

collection.

Not:

documents.

Singular antecedent.

Harder example: possession and contraction

The company said ___ expanding ___ research program.

Need:

it is expanding its research program.

Correct:

The company said it's expanding its research program.

Two similar-looking forms doing different jobs.

Current ACT English context

ACT's current English standards explicitly include:

pronoun-antecedent agreement;
vague and ambiguous pronouns;
pronoun person;
reflexive pronouns;
possessive pronouns such as its and your;
who/whom usage;
possessive punctuation.

These sit within Conventions of Standard English, which currently represents roughly 38–43% of enhanced ACT English reporting content.

Practice set

1

The engineers checked the device because they suspected a loose connection.

Antecedent:

engineers.

Clear.

2

Priya told Lena that she had won.

Ambiguous.

Revise by naming winner.

3

The coach spoke to Elena and I/me.

Object after:

spoke to.

4

The robot lost its/it's balance.

Possession:

its

5

The scientist who/whom discovered the species published the paper.

Subject of:

discovered.

who

6

The scientist who/whom the university hired published the paper.

University hired:

him/her.

whom

How to review pronoun mistakes

Bad note:

pronoun error.

Better:

I used "she" even though two female antecedents were equally plausible.

Or:

I chose "I" after a preposition because it sounded formal.

Or:

I treated "it's" as possessive instead of expanding it to "it is."

FAQ: ACT pronouns and possessives

What is an antecedent?

The noun a pronoun refers to.

What is the biggest pronoun trap?

Ambiguous reference—when a pronoun could refer to more than one noun.

How do I choose I vs me?

Remove the other noun and test whether the pronoun acts as subject or object.

How do I choose who vs whom?

Use he/him: he → who; him → whom.

Is "it's" possessive?

No. It's = it is / it has. Its = possessive.

Do possessive pronouns use apostrophes?

No: its, hers, ours, yours, theirs.

How do plural possessives work?

Regular plural ending in s usually takes an apostrophe after the s: students' projects.

Final takeaway

Pronoun questions become manageable when you separate the decisions.

antecedent → clarity → agreement → case

For possessives:

ownership or contraction?

Do not choose by sound or formality.

Identify the grammatical relationship first.

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