- which */*/*/
- UK [wɪtʃ] / US / US [hwɪtʃ]
determiner, pronoun
Summary:
Which can be used in the following ways: - as a determiner (followed by a noun): Which colour do you like best? - as a pronoun (without a following noun): Choose any card – it doesn't matter which. (introducing a question): Which is the hottest month of the year? (followed by "of"): Which of you is responsible for this department? (introducing a relative clause): My car, which I have owned for five years, is a Ford.1)a) used for asking for a specific choice from a limited number of possibilitiesWhich would you like, tea or coffee?
which of:Which way did they go?
Which of the secretaries did you talk to?
b) used when someone knows, says, is not certain about etc the specific choice between two or more possibilitiesThey're all so pretty – I don't know which one to choose.
It was either whisky or vodka – I forget which.
Did he say which hotel he was staying at?
I don't know which is worse – spending Christmas alone or watching my friends get drunk.
2) used for introducing information that shows what specific thing or type of thing you are talking about. You can also use "that" to introduce this type of relative clause, and this is more usualI've been thinking about those questions which you asked me last week.
It's a story which every child will enjoy.
the air crash in which Hammarskjöld died
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Usage note:
The relative pronouns which or that are often left out when they are the object in this type of relative clause: Did you find the book (which/that) you were looking for?3) used for adding information or a comment about a particular thing or fact when it is already clear what that thing or fact isBogart starred in the film Casablanca, which was made in 1942.
A skilled workforce is essential, which is why our training programme is so important.
in which case (= if this happens):The search will not begin until dawn, by which time it will probably be too late.
Of course it may rain, in which case we shall have to hold the ceremony indoors.
•know/tell which is which
— to be able to see the difference between two or more similar thingsThey look exactly alike to me. How can you tell which is which?
English dictionary. 2014.