First off all, we must need talk about relative
pronouns, and how we use who, whom, whose, that, or which.
These relative pronouns are used after a noun, just to
make clear which person or thing we are talking about. To emphasize that the
more important in the context is the noun and his importance.
For example: Leonardo DiCaprio, who did not won an
Oscar 7 times before, he won this year with "The Revenant".
The part of the phrase that has the information about
the person or the thing is a ‘relative clause’, it initiate by a relative
pronoun.
How to use relative pronouns:
Who (people) – Fabio, who loves pets, has a handsome
black dog.
Whom (people, very formal) - Milan Kundera is the
writer whom I like a lot.
Whose (possession) – The Film whose actor I like to
see in action movies
Which (places or things) - This is the house which the
pool is huge
That (subst. who or which, less formality) -
This is the house that my family dreamed about.
