1 Enough comes after adjectives (without nouns) and adverbs.

Is it warm enough for you? (NOT ... enough warm ...)

You’re not driving fast enough.

2 Enough comes before nouns.

Have you got enough milk? (NOT ... enough of milk.)

There isn’t enough blue paint left.

We use enough of before pronouns and determiners (for example the, my, this).

We didn’t buy enough of them.

The exam was bad. I couldn’t answer enough of the questions.

Have we got enough of those new potatoes?

3 We can use an infinitive structure after enough.

She’s old enough to do what she wants.

I haven’t got enough money to buy a car.

It’s late enough for us to stop work.