Enoughis a determiner, a pronoun or an adverb. We useenoughto mean ‘as much as we need or want’.
Enoughas a determiner
We can useenoughbefore a noun as a determiner:
A:Do you haveenough moneyto pay for your train fare and taxis?
B:Yes, thanks. I’m fine.
There wasenough foodfor about ten people.
We useenough ofbefore other determiners (the, my) and pronouns (us, them):
You haven’t eatenenough ofyour dinner, Jason.
Not:You haven’t eaten enough your dinner, Jason.
There weren’tenough ofthem.
Not:There weren’t enough them.
Enoughas a pronoun
We can useenoughas a pronoun:
[at the end of a meal]
A:Have you hadenough?
B:Yes, thanks. That was delicious.
I need to go and get some more chairs. There aren’tenoughhere.
Enoughas an adverb
We useenoughas an adverb of degree:
A:Are you ready for your exam?
B:Yes, I think I’ve studiedenough.That’s all I can do.
We useenoughas an adverbdirectly after an adjective or directly after another adverb:
Is this boxbig enoughfor all those books?
Not:Is this box enough big…
Strangely enough, no one seemed to notice that Boris was in his pyjamas.(It is/was strange that no one …)