Knowing how to add extra details about people in English makes your sentences richer and more precise. The words who, whom, whose, and that let you include comments about someone without starting a brand new sentence. Mastering these relative pronouns is one of the fastest ways to sound more natural and confident in everyday conversation.
How do you use "who" and "that" as subject pronouns?
Who and that are used when the person you are describing is the subject of the clause — the one performing the action. The simplest way to check is to ask a question and answer it with he, she, or they [0:56].
- "The neighbor who has the angry cat is moving out." — Who has the angry cat? He/she does [1:27].
- "The girl who has four sons is having a baby girl." — Who has four sons? She does [2:55].
You can replace who with that in both examples. The meaning stays the same; the only difference is register. Who sounds more formal, while that is common in casual speech [2:10].
What is the quick test for "who"?
Ask yourself the question behind the extra information. If you can answer with a subject pronoun (he, she, they), then who is the right choice. For example: "Who can speak six different languages? He can." That confirms you need who, not **whom" [7:17].
When should you use "whom" and "that" as object pronouns?
Whom and that appear when the person you describe functions as the object of the clause — the one receiving the action. You can replace whom with him, her, us, or them [3:35].
- "The man whom I interviewed for the job was not qualified." — Who did I interview? I interviewed him [3:55].
- "The barista whom I ordered from gave me the wrong coffee." — Who did I order from? I ordered from him/her [4:35].
Just like with who, you can swap whom for that in informal contexts: "The man that I interviewed for the job was not qualified" [4:22].
How do you confirm "whom" is correct?
Ask who received the action and answer with an object pronoun. "The girl whom I love has a boyfriend." — Who is he in love with? He is in love with her [6:30]. If the answer uses him, her, us, or them, whom is your word.
How does "whose" show possession when describing people?
Whose is the only option when you need to express possession — think his, her, their, or our [1:05]. It does not mean you "own" people; it simply connects a person to something that belongs to them.
- "The man, whose brother is the world champion, won the Olympic gold." — Who is the world champion? His brother [5:05].
- "The neighbor whose baby is always crying is pregnant." — Who is always crying? Her baby [5:38].
What practice exercises help you remember?
Try these quick checks from the lesson:
- "The team, whose coach just retired, will be going to the national tournament next week." — Who just retired? Their coach [6:02].
- "My friend, whose house is for sale, is moving to New York." — Whose house? His/her house [7:50].
- "My friend, who is the same age as me, is now my boss." — Who is the same age? He/she is [8:15].
The pattern is consistent: answer with a subject pronoun → use who; answer with an object pronoun → use whom; answer with a possessive → use whose. Practicing this three-question technique turns a tricky grammar point into something completely manageable.
If you found these examples helpful, try writing your own sentences using who, whom, and whose and share them in the comments — it is the best way to make the grammar stick.
