Determiner

D. A Determiner is a modifying word that determines the kind of reference a noun or noun group has. Determiners can be Specific or General. (e.g. a, the, every)
a. Specific Determiners are the definite article ‘the’; 'possessives' (my, your, his, her, its; our, their, whose); 'demonstratives' (this, that, these, those); 'interrogatives' (which)
1. use a Specific Determiner when we know exactly what we are referring to (e.g. Can you pass me the salt please?)
b. General Determiners are: a, an, any, another, other, what, etc.
1. When we are talking about things in general, we can use a uncountable noun or a plural noun without Determiner (e.g. Milk is very good for you.) or can use a singular noun with the 'indefinite article 'a/ an' (e.g. A woman was lifted to safety by a helicopter.)
2. use the General Determiner 'any' with a singular noun or an uncountable noun when we are talking about all of those people or things. (e.g. It’s very easy. Any child can do it. (= All children can do it))
3. use the General Determiner 'another' to talk about an additional person or thing. (e.g. Would you like another glass of wine?) The plural form of another is 'other'. (e.g. I spoke to John, Helen and a few other friends.)

Interrogative Determiner

D1. Interrogative Determiner is a word used in questions, such as how, which, or what.
a. We use 'which' as a determiner to ask a question about a specific group of people or things. (e.g. Which restaurant did you go to? Which countries in South America have you visited?)
b. When we are asking a general question we use 'what' as a determiner. (e.g. What films do you like? What university did you go to?)

more about the Noun ...