Modal auxiliary verbs. To uses the verb "to be" as a main verb. The main verb. Possibility and Ability. Infinitive without "to". An auxiliary verb, a modal auxiliary verb. A real question. The main uses of Education and verbs in the English language.
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Can, Could, Be able to Can and could are modal auxiliary verbs. Be able to uses the verb to be as a main verb. It is not an auxiliary verb, but we look at it here for convenience. Can Can is an auxiliary verb, a modal auxiliary verb. We use can to: · talk about possibility and ability · make requests · ask for or give permission Structure of Can subject can main verb The main verb is always the bare infinitive (infinitive without to). subject auxiliary verb main verb I can play tennis. - He cannot play tennis. cant ? Can you play tennis? Notice that: · Can is invariable. There is only one form of can. · The main verb is always the bare infinitive. Use of Can can: Possibility and Ability We use can to talk about what is possible, what we are able or free to do: · She can drive a car. · John can speak Spanish. · I cannot hear you.