We use 'such' to talk about things that are alike or of the type we just spoke about. It helps show an example or describe the quality of something.
I have never seen such a big dog.
She told me such a funny story yesterday.
'Such' is used to add strong meaning to a noun or noun phrase. It shows that something is very good, bad, or strong in some way.
She gave such great advice to me.
It was such a cold day yesterday.
'Such' can be used alone as a pronoun. It talks about a type or example of something already mentioned or known.
Such is the life of a teacher.
I do not like such as those.
'Such' can appear in fixed phrases or idioms to talk about a type of behavior or fact. It helps express ideas clearly and sometimes emotionally.
I did not expect such behavior from you.
Such is life, full of surprises.
'Such' is often used in formal, legal, or official English to point to things, qualities, or amounts mentioned before. It has a precise and careful meaning.
The party shall pay such expenses as are necessary.
Claims for such damages must be proved clearly.