Relative pronouns
There are three basic rules:
WHO
is used with people
• The man who I told you about was my friend.
• Mrs. Smith, who lives on the 4th floor, is 100 years old.
WHICH
is used with things
• I’ve lost the book which you gave me for my birthday.
• Can I ask you about something which you won’t like?
WHERE
is used with places
• The café where we had the delicious dessert is just round the corner.
• I’ll show you the place where I got married.
BE CAREFUL!
In spoken English, relative pronouns are often missing. But this grammar will come much later.