This is the girl. She helped me yesterday.
This is the girl who helped me yesterday
This is the dog ____ barked all night.
that or which
The boy which won the race is my cousin.
which- who
I bought a car. It is very fast.
I bought a car that is very fast
Do you know the man ____ car was stolen?
whose
I live in a house who has a big garden.
who-which/that
I know the teacher. His lessons are very interesting.
I know the teacher whose lessons are very interesting
The book ____ I borrowed from you is fantastic.
that or which
She is the woman whose I met yesterday.
whose-whom
I visited the town. I was born there.
I visited the town where I was born
I’ll never forget the day ____ we won the competition.
when
This is the teacher which students love the most.
whom/that
This type of clause gives essential information about the noun.
defining
This is the day. We met on this day.
This is the day when we met
Is this the hotel ____ you stayed last summer?
where
The movie, that we watched last night, was amazing.
that- which