مدرسة القادسية

We use A or AN with singular nouns.

A is used when a noun starts with a consonant sound;

e.g. a dog, a book, etc.

AN is used when a noun starts with a vowel sound;

e.g. an apple, an hour, etc.

We use SOME with countable nouns (only with their plural) and with uncountable nouns.

SOME is used in:

* positive sentences;

e.g. I have got some time.

* questions, expressing requests and offers;

e.g. Would you like some tea?

        Can I have some biscuits?