1.can, as a modal verb, has the basic meanings of "neng", "neng", "possibility" and "meeting", which can indicate that physical strength and intelligence can accomplish a thing or the ability given by the environment; It can also indicate the possibility caused by environment or other factors, and is used in interrogative sentences or negative sentences; It can also indicate the permission of the environment, conditions or laws.

Can can also mean request, invitation, demand, surprise, etc.

3.can can be collocated with notional verbs to form a verbal compound predicate, which means "ability"; It can also be used in negative sentences or interrogative sentences, with be, progressive verbs or perfect verbs, to guess the present or the past, and to mean "impossible" and "is it …?" .

Modal verbs can and may have the meaning of "can, can, can". differentiate

1, can If you mean physical or intellectual ability, you should use can. Can is spoken and commonly used. When expressing theoretical possibility, can is used instead of may. In addition, can can not be used to express the possibility in the future, but is often used in negative sentences and interrogative sentences to express the possibility.

2.may is mostly used in formal style to show respect. And may can show the possibility of the future.