Who usually refers to people. That usually refers to things, animals, ideas, and objects. For a person, who sounds clearer and more natural: The woman who called you is here. For a thing, use that: The phone that rang was on the table.
The safe rule is simple: who = people, that = things. In casual English, that can sometimes refer to a person, but who is the better choice when you want your sentence to sound careful and human.
Who vs That: The Basic Difference
Who is a relative pronoun for people. It connects a person to extra information about that person. When the noun is a teacher, friend, child, customer, driver, writer, or visitor, who is usually the cleanest word.
That is a relative pronoun for things, animals, places, ideas, and actions. It connects a noun to information that identifies it. When the noun is a book, website, rule, table, car, app, or problem, that normally fits.
| Word | Best Used For | Natural Example |
|---|---|---|
| Who | People | The man who lives next door is a doctor. |
| That | Things and ideas | The rule that confused me is explained here. |
| That | Animals, when not treated like named people | The dog that barked is friendly. |
| Who | Named pets, when the pet feels personal | Bella, who sleeps by the door, is my dog. |
Use Who For People
Use who when the noun is a person. This includes one person, many people, job titles, family members, and named individuals. It sounds direct, polite, and natural.
✅ The teacher who helped me was patient.
✅ I met a writer who explains grammar clearly.
✅ The people who joined the class arrived early.
In these sentences, teacher, writer, and people are human. That is why who is the best match.
Common People Words That Usually Take Who
- person: the person who called
- student: the student who answered
- teacher: the teacher who explained it
- friend: a friend who listens
- customer: a customer who needs help
- child: a child who asks questions
- doctor: the doctor who treated him
If you can replace the noun with he, she, or they, who is usually the better choice.
Use That For Things, Ideas, And Objects
Use that when the noun is not a person. This includes objects, tools, websites, rules, ideas, lessons, places, and events.
✅ The laptop that I bought works well.
✅ The lesson that we studied was short.
✅ The website that loads faster is easier to use.
✅ The idea that she shared was helpful.
A laptop is a thing. A lesson is not a person. A website is an object or digital place. An idea is abstract. These nouns work naturally with that.
Is That Wrong For People?
That is not always wrong for people. In many everyday sentences, native speakers say things like the person that called or someone that knows the answer. These are common in casual English.
Still, who is usually better when the noun is a person. It sounds more natural in careful writing, schoolwork, business emails, grammar explanations, and formal contexts.
| Sentence | Status | Why |
|---|---|---|
| The woman who called you left a message. | ✅ Best choice | Woman is a person, so who fits naturally. |
| The woman that called you left a message. | Acceptable in casual English | That can refer to people in some defining clauses, but who sounds better. |
| The phone who rang is mine. | ❌ Incorrect | Phone is a thing, not a person. |
| The phone that rang is mine. | ✅ Correct | That fits a thing. |
Simple Writing Rule
When you are unsure, write who for people and that for things. This rule keeps most sentences clean.
Who vs That With Animals
Animals usually take that, especially when the animal is described in a general way. Use that for a bird, dog, cat, horse, or insect when the sentence treats it as an animal, not like a named character.
✅ The cat that sits on the wall is quiet.
✅ The bird that flew into the tree had red wings.
✅ The horse that won the race was fast.
Use who for an animal when it has a name and the sentence gives it a personal feeling. This is common with pets.
✅ Max, who loves warm blankets, is sleeping.
✅ Bella, who follows me everywhere, is very friendly.
Who vs That With Groups And Organizations
Groups can be tricky because a group may refer to people as a unit. Words like team, company, committee, class, and family often take that when the group acts as one unit.
✅ The team that won the match trained hard.
✅ The company that built the app is growing.
✅ The class that finished early went outside.
Use who when you clearly mean the individual people inside the group.
✅ The team members who stayed late cleaned the room.
✅ The employees who answered the survey gave useful feedback.
✅ The students who worked together finished the task.
When Who Sounds Better Than That
Who sounds better when the sentence is about a real person, a role, or a human action. It makes the sentence feel more respectful and direct.
✅ Better With Who
The nurse who helped us was kind.
The neighbor who moved in yesterday is friendly.
Anyone who needs help can ask.
⚠️ Less Natural With That
The nurse that helped us was kind.
The neighbor that moved in yesterday is friendly.
Anyone that needs help can ask.
The sentences with that may be heard in conversation, but the sentences with who read more smoothly.
When That Sounds Better Than Who
That sounds better when the noun is a thing, place, idea, rule, or result. In these cases, who sounds wrong because the noun is not human.
✅ Correct With That
The answer that you gave was clear.
The chair that broke was old.
The page that opened first had the form.
❌ Wrong With Who
The answer who you gave was clear.
The chair who broke was old.
The page who opened first had the form.
Who vs That In Defining Clauses
A defining clause tells the reader exactly which person or thing you mean. It is needed for the sentence to make sense. In this type of clause, who and that can sometimes both refer to people.
✅ The person who sent the email is waiting.
Also common: The person that sent the email is waiting.
Best for careful writing: The person who sent the email is waiting.
For things, use that in defining clauses.
✅ The email that arrived this morning is important.
❌ The email who arrived this morning is important.
Who vs That In Non-Defining Clauses
A non-defining clause adds extra information. It is usually separated by commas. In this type of clause, use who for people. Do not use that after the comma.
✅ My sister, who lives in London, is visiting soon.
❌ My sister, that lives in London, is visiting soon.
✅ Mr. Allen, who teaches English, wrote the note.
❌ Mr. Allen, that teaches English, wrote the note.
After a comma, that is usually not used as a relative pronoun. For people, choose who. For things, choose which.
Who, That, And Which: A Useful Side Note
Who is for people. That is often for things in defining clauses. Which is also for things, especially when the information is extra and set off by commas.
| Use | Example | Meaning |
|---|---|---|
| Who for people | The boy who won the prize smiled. | The clause identifies the boy. |
| That for things | The bag that I lost was black. | The clause identifies the bag. |
| Which for extra information | The bag, which was black, was under the desk. | The clause adds extra detail. |
| Who after a comma | My brother, who is a chef, made dinner. | The person is already known. |
Easy Test: Person Or Thing?
Before choosing who or that, look at the noun before the blank. Is it a person? Use who. Is it a thing or idea? Use that.
- Find the noun: teacher, book, website, person, idea.
- Ask what it is: person or not a person?
- Choose the pronoun: who for people, that for things.
- Check for commas: after a comma, avoid that.
The woman ___ helped me was kind.
Noun: woman = person
Answer: The woman who helped me was kind.
The file ___ opened slowly was large.
Noun: file = thing
Answer: The file that opened slowly was large.
Common Mistakes With Who And That
Mistake 1: Using Who For Objects
This is the clearest error. Who points to people, so it should not describe a phone, chair, book, rule, or website.
❌ The chair who broke was old.
✅ The chair that broke was old.
Mistake 2: Using That After A Comma
That does not work well in extra-information clauses after a comma. Use who for people and which for things.
❌ Sarah, that studies French, is in my class.
✅ Sarah, who studies French, is in my class.
❌ The bus, that was late, arrived at noon.
✅ The bus, which was late, arrived at noon.
Mistake 3: Treating That For People As Always Wrong
Many learners hear that that is only for things. That rule is useful, but real English is a little more flexible. In defining clauses, that can refer to people. The safer and more polished choice is still who.
Common: The person that called is outside.
Better for careful writing: The person who called is outside.
More Examples Of Who vs That
| Noun | Correct Sentence | Reason |
|---|---|---|
| doctor | The doctor who examined me was calm. | A doctor is a person. |
| message | The message that appeared on the screen was short. | A message is a thing. |
| friend | I have a friend who speaks Spanish. | A friend is a person. |
| car | The car that stopped outside is blue. | A car is a thing. |
| students | The students who finished early read quietly. | Students are people. |
| question | The question that confused me was simple. | A question is an idea or sentence. |
| team | The team that scored first won. | The team is treated as one unit. |
| team members | The team members who scored first celebrated. | The members are people. |
Practice: Choose Who Or That
Try each sentence by checking the noun first. Person or thing?
Practice Sentences
- The man ___ opened the door smiled.
- The door ___ opened slowly made a noise.
- The teacher ___ explained the rule used simple examples.
- The rule ___ confused me is now clear.
- The dog ___ barked last night belongs to our neighbor.
Answers
- who — man is a person.
- that — door is a thing.
- who — teacher is a person.
- that — rule is an idea.
- that — dog is an animal in a general sentence.
Short Answer For Daily Writing
Use who when you mean a person:
The customer who asked for help was polite.
Use that when you mean a thing, idea, animal, or object:
The form that you filled out is complete.
Use who for people when you want the safest and most natural choice.
Frequently Asked Questions About Who And That
Can I Say The Person That Called?
Yes. The person that called is common in casual English. For cleaner writing, the person who called is usually better.
Is Who Only For Humans?
Who is mainly for people. It can also be used for named pets when the animal is treated personally: Charlie, who loves walks, is waiting by the door.
Can That Refer To A Group Of People?
Yes. Use that when the group is treated as one unit: The team that won the match trained hard. Use who when you mean the individual people: The players who trained hard improved.
Should I Use Who Or That In Formal Writing?
Use who for people in formal writing. Use that for things in defining clauses. This choice is clear and widely accepted.
What Is The Biggest Error With Who And That?
The biggest error is using who for a thing: The phone who rang. A phone is not a person, so the correct sentence is The phone that rang.
