Modals

own in a sentence. They are always followed by the infinitive (= base form of a verb).

We use modals when we want to express some ability, possibility, suggestion, request, obligation, prohibition, offer, promise, ask for permission, or something like that.

I can swim. (ability)

Can / Could / May I borrow your pencil, please? (permission)

You must / should / ought to do your homework. (duty)

You need to be here by 8 a.m. (necessity)

You needn't / don't have to do it. (lack of necessity)

You mustn't / can't smoke in here. (prohibition)

You should be more patient. (advice)

Will / Would / Can / Could you open the window? (request)

Shall we eat out? (offer)