which · determiner /wɪtʃ/Full view
which
A1 used to ask or talk about a choice between two or more things
Dictionary examples:

Which jacket do you prefer?

Which time is better for you - 12:15 or 12:45?

I don't know which one to choose.

Learner example:

Which car did he use, the McLaren or the Ferrari? (Key English Test; A2; Spanish)

which · pronoun /wɪtʃ/
which (CHOICE)
A2 used to ask or talk about a choice between two or more things
Dictionary examples:

Which of these do you like best?

Which is the best way to the station?

Learner example:

Which would you recommend and why? (Preliminary English Test; B1; Chinese)

which (REFERRING TO SOMETHING)
A2 used at the beginning of a relative clause to show what thing is being referred to
Dictionary examples:

These are problems which we all know about.

You know that little Italian restaurant - the one which I mentioned in my letter?

Learner example:

I like to wear clothes which are black or blue. (Preliminary English Test; B1; Swiss German)

which (ADDING INFORMATION)
B1 used to give extra information about something
Dictionary example:

The book, which includes a map, gives you all the information you need about Budapest.

Learner example:

Turning to the end-of-conference party, it is going to be held in a nearby buffet restaurant, Valentine's, which has good quality food and reasonable prices. (First Certificate in English; B2; Korean)

which (AFTER PREPOSITION)
B2 used after a preposition to show what thing is being referred to
Dictionary examples:

Is that the film in which she sings?

The death of his son was an experience from which he never fully recovered.

It isn't a subject to which I devote a great deal of thought.

Learner example:

According to your advertisement in a language magazine you have a vacancy in your campsites, in which I am very interested. (First Certificate in English; B2; German)

which (GIVING OPINION)
B2 used when you give an opinion or comment about what you have just said
Dictionary example:

He showed me around the town, which I thought was very nice of him.

Learner example:

I am very interested in being able to help [o]n such a project, which I think is a very good one. (First Certificate in English; B2; Portuguese)

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