Determiners

Determiners are words like the, an, my, some. They are grammatically similar. They all come at the beginning of noun phrases, and usually we cannot use more than one determiner in the same noun phrase.

Articles:

a, an, the

Possessives:

my, your, his, her, our, their

Other determiners:

each, every
either, neither
any, some, no
much, many; more, most
little, less, least
few, fewer, fewest
what, whatever; which, whichever
both, half, all
several
enough

Some grammarians do not consider determiners as adjectives, but give them a class of their own.