Relative pronouns (who, whom, which, that, whose, where, when) link two clauses to give more information about a noun.
| Pronoun | Used for | Function |
|---|---|---|
| who | people | subject of the clause |
| whom | people (formal) | object of the clause |
| which | things, animals | subject or object |
| that | people / things | subject or object (informal) |
| whose | people / things | possession |
| where | places | place |
| when | time | time |
who: The man who lives next door is a doctor.
whom: The lady whom I met yesterday is my new teacher.
which: The book which I bought is interesting.
that: The car that Tom drives is expensive. (replaces "which" or "who")
whose: The boy whose father is a lawyer is my friend.
where: Marrakech is the city where I was born.
when: 1956 is the year when Morocco gained independence.
(1) I know the woman. (2) The woman won the Nobel Prize.
β Repeated noun: the woman (= a person, subject) β use who.
β I know the woman who won the Nobel Prize.
The information is needed to identify the noun.
No commas.
The man who lives next door is a doctor.
(Tells which man.)
The information is extra; the noun is already clear.
Commas are used.
My father, who is 60 years old, is retired.
("That" is not used here.)
"That" can replace both in defining clauses (informal).
Works for people AND things: the woman whose sonβ¦, the company whose CEOβ¦
With commas = non-defining (extra info). Without = defining (essential info).
The exam often gives two sentences to join with a relative pronoun. Step 1: find the repeated noun. Step 2: identify if it's a person, thing, place, time or possession. Step 3: pick the right pronoun.