which

A1used to ask about one or more things from a limited group

• Which bus goes to the station?
• Which colour do you prefer, red or blue?

QUESTION

A1used to ask about one or more things from a limited group

• Which of these bags is yours?
• There are two cakes. Which do you want?

DESCRIBING

A2used to show which thing you are talking about

• The book which I lent you is very old.
• Is this the train which goes to the airport?

EXTRA INFORMATION

B1used to add more information about a thing or situation

• He forgot my birthday, which made me sad.
• The hotel, which was built in 1900, has 50 rooms.