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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




Hi Team.
Help me with this, please..
Which ones of these interrogative sentences is correct?
1. Why isn't there "to" after verb "want" in the sentence?
2. Why after verb "want" there's no "to" in the sentence?
Would you like to explain, please?
Thank you.

Hello Nizam,

1 is almost correct -- instead I'd say 'Why isn't there a 'to' after the verb 'want' in the sentence?'. 2 is almost correct, also -- instead I'd recommend 'Why is there no 'to' after the verb 'want' in the sentence?'.

All the best,
The LearnEnglish Team

Hello Mr Kirk,
Why in your first sentence you used the article 'a' before 'to' and why not in your second sentence.
All the best

Hello knownman,

In the second sentence, the word 'to' already has a quantifier: 'no'. 'no' takes the place of the determiner 'a'; it's not correct to use both of them together.

All the best,
The LearnEnglish Team

If we are asking for the definition of a term, what should we use----what or who? For example, which of the following sentences is right?
What is a zookeeper?
Who is a zookeeper?


Hi naghmairam,

To ask for a definition you should use 'what'. If you ask 'who' then you will be told the name of the person who has this job.


Best wishes,


The LearnEnglish Team

Dear Sir,

Which one is correct.
1. Sara can play _a_ guitar.


Sara can play _the_ guitar.

Hello Gobin Sonowal,

Both 'a' and 'the' are possible here - which one is correct depends on the context. Please see our English Grammar section on Articles and our Quick Grammar page on Articles for explanations of the differences between them.

All the best,
The LearnEnglish Team

hello sir
the statement : what films do you like?
it can't be understood that its also a question about (type) of films you prefer ?
thank you

Hello dentist iraq,

You are correct: this can be a question about specific films of kinds of film, depending on the context. A more likely question would be 'What kind(s) of films do you like?' if the context did not make it clear that we were talking about types.


Best wishes,


The LearnEnglish Team