And As A Conjunction

And is used to join two or more grammatically similar expressions.

When two clauses are joined by and, there are many possible relationships between them – time, cause and effect, contrast, condition etc.

Adjectives before a noun

We do not usually use and between adjectives used before a noun.

However, and is used when the adjectives refer to different parts of the same thing.
green and white socks

And after try, be sure etc.

We often use try and/be sure and — instead of try to/be sure to — This is informal.

Note that we only use this structure with the simple base forms try/be sure. It is not possible with tries, tried, trying or am/is/are/was/were sure.