Too
An Adverb of excess; with to + infinitive and/or for + (pro)noun
This soup is very hot, I can’t drink it.
This soup is too hot (for me) to drink.
That’s a lot of money; a book like that shouldn’t cost so much.
That’s too much money for a book like that.
Enough
Whereas too has a negative sense, enough, also with infinitive, has positive sense.
Compare:
He is too ill to need a doctor.
= He is so ill that it’s useless to send for a doctor.
He is ill enough to need a doctor.
= He is so ill that we must send for a doctor at once.
Enough comes in front of a noun and after an adjective or adverb.
Remarke these sentences, using ‘too’.
It’s very cold, we can’t go out.
This book is very difficult; I can’t read it.
She came very late; the lesson was over.
This hat is very big; he’s only a little boy.
It’s very far; we can’t walk.
Reword the following, using enough to:
You are quite clever, you understand perfectly.
You are quite old now, you ought to know better.
I am very tired, I can sleep all night.
Are you very tall? Can you reach that picture?
The fruit is ripe, we can pick it.