interrogative determiners: which and what
We use "which" as a determiner to ask a question about a specific group of people or things:
Which restaurant did you go to?
Which countries in South America have you visited?
When we are asking a general question we use "what" as a determiner:Which countries in South America have you visited?
What films do you like?
What university did you go to?
What university did you go to?
indefinite article: a and an
1. We use the indefinite article, a/an, with count nouns when the hearer/reader does not know exactly which one we are referring to:
Police are searching for a 14 year-old girl.
2. We also use it to show the person or thing is one of a group:
She is a pupil at London Road School.
Police have been searching for a 14 year-old girl who has been missing since Friday. Jenny Brown, a pupil at London Road School, is described as 1.6 metres tall with short blonde hair. She was last seen wearing a blue jacket, a blue and white blouse and dark blue jeans and blue shoes. Anyone who has information should contact the local police on 0800349781. |
3. We do not use an indefinite article with plural nouns and uncount nouns:
She was wearing blue shoes. (= plural noun)
She has short blonde hair. (= uncount noun)
Police have been searching for a 14 year-old girl who has been missing since Friday.She has short blonde hair. (= uncount noun)
Jenny Brown, a pupil at London Road School, is described as 1.6 metres tall with short blonde hair.
She was last seen wearing a blue jacket, a blue and white blouse and dark blue jeans and blue shoes.
Anyone who has information should contact the local police on 0800349781.
4. We use a/an to say what someone is or what job they do:
My brother is a doctor.
George is a student.
5. We use a/an with a singular noun to say something about all things of that kind:George is a student.
A man needs friends. (= All men need friends)
A dog likes to eat meat. (= All dogs like to eat meat)
A dog likes to eat meat. (= All dogs like to eat meat)
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