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Interrogative determiners: 'which' and 'what'

Level: intermediate

The interrogative determiners are which and what.

which is a specific determiner

Here are three books. Which book do you think is the most interesting?
They have four boys. Which boy is the oldest?
I can’t remember which house Janet lives in.
Which restaurant did you go to?


what is a general determiner

What food do you like?
I don’t know what job she does.

Interrogative determiners 1


Interrogative determiners 2




Thank you Peter. I will try to understand it better.

Thank you indeed Peter. I have now an understanding to make a better use.

Hello zeeshan-hussain,

It's hard for me to comment without seeing the whole sentence, as both 'those' and 'which' are possible, depending on how the sentence ends. If it was a relative clause then 'which' is necessary and 'those' is not possible as 'those' is not a relative pronoun.

You can learn more about relative clauses here.

Best wishes,


The LearnEnglish Team

Which is corect?
Which course are offering? or What course are you offering?

Thanks for you help.


You can only use "which" when you have a list choice known to your listener, else you make use of "what" since it will be a general question out of all causes which may not even be known to your listener.


The second sentence is correct (with 'you').

Best wishes,


The LearnEnglish Team


If i want to ask someone about the brand of the watch the person is wearing, then which of the following would be more appropriate :
That's a nice watch, what brand is it ? or That's a nice watch, which brand is it ?


Hello ash_grooovy,

Both are grammatically correct. The difference is that 'what' here is open and we would use it when we are asking about any brand. We would use 'which' when we are asking about a limited number of options (brand x or brand y).

Best wishes,


The LearnEnglish Team

Thanks for your time.

What's the difference between these?
Which restaurant did you go to?
What university did you go to?
both are specific