1. How they are formed
who (people) which (things/animals) that (people/things) where (places)
Relative clauses add extra information about a noun.
Rule details
B1 (Intermediate)
who (people) which (things/animals) that (people/things) where (places)
Relative clauses add extra information about a noun.
Who (people):
The teacher who helped me is very kind.
Which (things/animals):
The book which I bought yesterday is interesting.
That (people/things):
The movie that we watched was great.
Where (places):
This is the house where I grew up.
Who vs That
Who is specific for people; that is more general and often informal.
Which vs That
Which is preferred in non-defining clauses; that is common in defining clauses.
Where
Use where with places instead of repeating prepositions and pronouns.