Modal Verbs in English
Modal verbs are auxiliary or helping verbs that add a sense of ability, possibility, advisability, necessity, obligation, request, permission, or future to the main verb of a sentence. The modal verbs are can, could, shall, should, will, would, may, might, and must.
In this short book, learn
how we use modal verbs
contractions with modal verbs, which modal verb is rarely contracted and which has no contracted form
how to ask questions with modal verbs
important rules about the use of modal verbs