Determiners are words placed in front of a noun to make it clear what the noun refers to. They always agree in gender and number with the nouns they modify.
There are 5 types of determiners:
‘a’ and ‘an’ are indefinite articles, and ‘the’ is a definite article.
They show where an object, event, or person is in relation to the speaker.
They serve to express ownership or possession. They do not replace a noun as pronouns do.
We use them when we want to give someone information about the number of something: how much or how many.
They are words that come before a determiner and modify it. They are normally placed before an indefinite article and followed by the determiner. ‘Such’ and ‘what’ are often used to express surprise or other emotions; ‘rather’ and ‘quite’ refer to the degree of a particular quality.