He is the actor who was awarded the Oscar.
I bought a camera which doesn’t work properly.
I’ll never forget the day when the earthquake happened.
That’s Mr Brown, whose wife died last month.
Have you got somewhere where I can store my books?
Give us essential information – information that tells us who or what we are talking about.
No commas
We can use THAT
instead of WHO/WHICH
Relative pronouns can be omitted
we can omit WHO/WHICH/THAT when they are followed by SUBJECT+VERB
That's the song I like
WHO: to refer to people.
WHICH: to refer to things and animals.
WHOSE: to show possession. It can refer to people, things, and animals.
WHEN: to refer to time
WHERE: to refer to places
Provide some additional information that is not essential and may be omitted without affecting the contents of the sentence
Between commas
We cannot use THAT
Relative pronouns cannot be omitted