What Type Of Speech Is Who? | Pronoun Uses Made Clear

You’ve seen “who” a thousand times, yet it can still feel slippery. Is it a pronoun? A noun? A word that only shows up in questions? The good news: once you spot the job “who” is doing in the sentence, its label becomes straightforward.

This guide shows the main categories English teachers and grammar references use, plus quick checks you can run in seconds while writing or editing.

Fast map of how “who” works

Use of “who”	What type of speech it is	Mini example
Asking about a person	Interrogative pronoun	Who called you?
Introducing a clause that describes a person	Relative pronoun	The teacher who helped me smiled.
Standing for “the person who” with added emphasis	Compound relative pronoun (“whoever”)	Whoever finished early left.
Possession linked to a person	Related pronoun form (“whose”)	Whose jacket is this?
Formal object position	Related object form (“whom”)	Whom did you invite?
After a preposition in formal writing	Object form with preposition	To whom it may concern
In indirect questions	Interrogative pronoun inside a clause	I wonder who called.
As a subject in a clause with verb agreement choices	Pronoun controlling verb agreement	Who is ready?

What “type of speech” means in grammar classes

Teachers often say “type of speech” when they mean part of speech: noun, verb, adjective, pronoun, and so on. In that system, “who” sits in the pronoun family because it replaces a noun phrase that refers to a person.

That label is broad. Inside “pronoun,” grammar splits words by how they’re used. “Who” shifts between a small set of roles, yet it stays a pronoun across those roles.

What type of speech is who in everyday questions

In a direct question, “who” is an interrogative pronoun. It stands in for the unknown person you’re asking about. It can act as the subject or the object of the verb.

“Who” as the subject in a question

If “who” is doing the action, it’s the subject.

• Who broke the glass?
• Who wants the last slice?

A quick check: replace “who” with “she” or “they.” If the sentence still works, “who” is sitting in the subject slot.

“Who” as the object in a question

If the action is done to the person, “who” is the object in casual English.

• Who did you call?
• Who are you waiting for?

In formal writing, “whom” can appear in these object spots. Many writers stick with “who” in speech and casual writing, then switch to “whom” only when the tone calls for it.

“Who” inside a sentence

“Who” also shows up in indirect questions, where the question is tucked inside a statement.

• I can’t tell who sent the email.
• She asked who was coming.

The classification stays the same: it’s still an interrogative pronoun, just embedded inside a larger clause.

“Who” as a relative pronoun in clauses

When “who” introduces a clause that modifies a person or people, it’s a relative pronoun. It connects the description to its antecedent, the noun it points back to.

Spotting the antecedent

Look for the noun right before the clause. That noun is usually the antecedent.

• The player who scored first waved to the crowd.
• Friends who listen matter.

Restrictive vs nonrestrictive “who” clauses

Some “who” clauses narrow down which person you mean. Others add extra detail.

• Restrictive: The student who missed class needs the notes.
• Nonrestrictive: Maya, who missed class, needs the notes.

Commas mark the nonrestrictive version. The part of speech does not change; “who” stays a relative pronoun.

Choosing between “who,” “whom,” and “whose”

These three forms share the same core meaning: they point to people. The choice depends on grammatical role.

If you want a reliable reference while teaching or checking writing, Purdue’s guide to pronouns is a solid quick read: Purdue OWL pronoun rules.

When “whose” fits

Use “whose” when the sentence calls for possession.

• Whose phone is ringing?
• The author whose book you borrowed spoke.

When “whom” fits

Use “whom” when the word is the object of a verb or a preposition in formal style.

• Whom did you hire?
• To whom did you speak?

A fast “him” test for “whom”

Swap in “he” or “him.” If “him” sounds right, “whom” is the formal match.

• You hired him → Whom did you hire?
• You spoke to him → To whom did you speak?

This test is not about being fancy. It’s just a clean way to check object position.

Verb agreement after “who”

Writers often stumble on agreement with “who,” mainly in questions like “Who are…” vs “Who is…”. The verb usually agrees with the expected answer.

Singular answer in mind

• Who is at the door? (One person)
• Who has my earbuds? (One person)

Plural answer in mind

• Who are those people? (More than one)
• Who have signed the form? (A group)

If the sentence points to a group, plural agreement can sound more natural. If it points to a single unknown person, singular agreement often lands better.

“Who” vs “that” for people

Many style guides prefer “who” for people and “that” for things. In casual writing, you’ll see both. When you want to sound polished, “who” is the safer pick for humans.

• Polished: The nurse who called left a message.
• Common in speech: The person that called left a message.

Dictionaries also classify “who” as a pronoun used for people. Merriam-Webster’s entry is a clear overview: Merriam-Webster definition of “who”.

“Who” as object inside relative clauses

In relative clauses, “who” can also act as the object. That’s one reason learners get stuck: the clause starts with “who,” yet the action happens later in the clause.

• The coach who the players trust spoke first.
• The friend who I met yesterday texted me.

In formal writing, “whom” can replace “who” in those lines because the pronoun is the object of “trust” or “met.” In casual writing, “who” is common and rarely confuses readers.

Prepositions and relative clauses

Prepositions create two common patterns. One is formal, with the preposition placed right before the pronoun. The other keeps the preposition later in the clause, which is normal in speech.

• Formal: The person to whom I spoke agreed.
• Casual: The person who I spoke to agreed.

If a class requires the formal pattern, the preposition is your clue that “whom” is expected.

“Who” after linking verbs

Linking verbs connect the subject to a description: “be,” “seem,” “become,” and similar verbs. After those verbs, “who” is still a pronoun, yet the case choice can feel odd.

• Who is she?
• Who are they?

Some older, formal rules prefer “whom” after a linking verb in sentences like “Whom are you?” because the word can be read as an object complement. Modern usage favors “who” in nearly all settings.

Why “who” shows up at the front

English questions often place question words at the start of the clause. That word order can hide the real role of “who.”

Compare these two pairs:

• Statement: You called someone. → Question: Who did you call?
• Statement: Someone called you. → Question: Who called you?

In both questions, “who” replaces “someone.” The part of speech stays the same. Only the sentence pattern changes.

Common mix-ups and clean fixes

Mix-up 1: Treating “who” like a name

“Who” can feel noun-like because it stands for a person, yet it still behaves like a pronoun. You don’t pluralize it the way you pluralize nouns, and you don’t add articles in front of it.

• Natural: Who’s coming?
• Awkward: The who is coming?

Mix-up 2: Using “who” after a preposition in formal lines

In formal style, prepositions pair with object forms. That’s where “whom” shows up.

• Formal: The colleague to whom I wrote replied.
• Casual: The colleague who I wrote to replied.

Both versions are widely understood. Choose the one that matches your audience and tone.

Mix-up 3: Confusing “who” with “whoever”

“Whoever” often means “any person who.” It can act as a subject or object, and it can also start a clause.

• Whoever wins calls first.
• Give the prize to whoever wins.

Quick checks you can run while editing

1. Find the role. Ask: is “who” doing the action, receiving it, or linking to a noun?
2. Try a swap. Replace “who” with “he/she/they” to test subject position.
3. Run the “him” test. If “him” fits, “whom” is the formal match.
4. Check commas. If the clause is extra detail, commas usually belong around it.
5. Listen for meaning. Pick agreement (“is/are”) that matches the person or group you mean.

When you’re unsure, read the sentence aloud with “he/him” in place. Your ear often catches the right choice faster than diagramming the whole line.

Which label to write on homework

If your worksheet asks, “What Type Of Speech Is Who?”, the safest answer is pronoun. If it asks for a finer label, choose based on use:

If you’re checking an assignment and you keep seeing the prompt what type of speech is who?, treat it as a two-step task: name the part of speech, then name the use in that sentence.

• Interrogative pronoun in direct or indirect questions.
• Relative pronoun when it introduces a clause that modifies a person.

On many assignments, “pronoun” earns full credit. Teachers who want the sub-type will usually show it in the directions or in the example items on the page.

In timed tests, this quick labeling keeps you calm and accurate.

Decision chart for choosing the right “who” form

Your sentence needs	Pick	Quick check
Ask about a person as the subject	who	Swap in “he/she/they”
Ask about a person as the object in formal style	whom	Swap in “him”
Show possession	whose	Try “his/her/their”
Link a clause to a person	who	It follows a noun naming a person
Mean “anyone who”	whoever	Try “any person who”
Formal preposition pattern	to whom / with whom	Preposition sits right before it

Mini practice set

Try these fast. Say the label out loud, then check your instinct by asking what job the word is doing.

• Who left the lights on?
• The neighbor who owns the dog waved.
• I don’t know who left the lights on.
• Whose turn is it?
• With whom did you travel? (formal)

One clear takeaway

“Who” stays in the pronoun lane. The only real question is which pronoun role it’s playing in your sentence. When you can name the role, you can label it, punctuate it, and match it to “whom” or “whose” when the sentence calls for those forms.

If you’re still staring at a prompt that asks what type of speech is who?, write “pronoun,” then add “interrogative” or “relative” when the task asks for more detail.