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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




Good morning Adam
I don’t understand why the question “which restaurant did you go to?” is written with which, don’t you think that’s too general and that’s why we also may use “what” just like: “what restaurant did you go to?”?.
Thank you.

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hi body
i ,m shabbir
today i learnt something that is uses of prefix it there are some examples of prefix
Prefix Examples
Prefix     Meaning  Example
a-, an-   without  amoral
ante-  before  antecedent
anti-   against  anticlimax
auto-   self  autopilot
circum-   around  circumvent
co-    with  copilot
com-,  con-  with  companion, contact
contra-  against  contradict
de-  off, away from  devalue
dis-  not  disappear
en-  put into  enclose
ex-  out of, former  extract, ex-president
extra-  beyond, more than  extracurricular
hetero-  different  heterosexual
homo-  same  homonym
hyper-  over, more  hyperactive
il-, im-, in-, ir-  not, without  illegal, immoral, inconsiderate, irresponsible
in-  into  insert
inter-  between  intersect
intra-  between  intravenous
macro-  large  macroeconomics
micro-  small  microscope
mono-  one  monocle
non-  not, without  nonentity
omni-  all, every  omniscient
post-  after  postmortem
pre-, pro-  before, forward  precede, project
sub-  under  submarine
syn-  same time  synchronize
trans-  across  transmit
tri-  three  tricycle
un-  not  unfinished
uni-  one  unicorn

Hi Shabbir,
That's a lot of prefixes! They are very useful in guessing the meaning of unknown words.
We have some exercises on prefixes here and here.
Best wishes,
The LearnEnglish Team

I like this site (Learn English British Council) it's very  helpful to improve  my knowledge in English Language ! Thanks a lot !       

I'm very happy to know

It is useful for me since I am undergoing britishcouncil Phase II training. Thank you

If the word 'the' is omitted from the sentence 'Which of the patients have recovered?', is it wrong grammatically?

Yes, it would be wrong. You could say 'Which patients have recovered?' which has a slightly more general meaning.
'Which of the patients have recovered?' suggests that a specific group of patients is known to both the speaker and the writer. However, they are extrememly close in meaning and it's hard to think of any circumstances where it wouldn't be possible to use both sentences.
The important thing to remember is that if you use 'Which of...', you have to use a determiner. You could say 'Which of these/those/the/my/your/her etc. patients have recovered?'
I hope that helps. Articles are a confusing area!
Best wishes,
The LearnEnglish Team