SUCH, WHAT, RATHER, QUITE

PRE-DETERMINERS:
SUCH, WHAT, RATHER, QUITE

These words are normally placed before the indefinite article.

Such and what are often used to express surprise or other emotions:
Examples

* What a lovely day!
* She's such a lovely woman!
* What an incredible film!
* He's such a fantastic guitarist!

Rather and quite are 'commenting' words, referring to the degree of a particular quality. They can express disappointment, pleasure, or other emotions, and are used before a/an + adjective + noun:
Examples

* It's rather a small car. (= I'm a bit disappointed because it's small)
* It was quite a nice day.(= I was agreeably surprised.)
* He's had quite a bad accident. (= I'm worried)
* I've just met rather a nice man. (= I'm pleased)