The negative form of Can cannot or cannot indicate mental or physical deficiency, impossible or forbidden.

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.

2.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 …?" . When used with verbs expressing perception, Can is usually not used in progressive aspect.

Extended data

Other uses of can:

Used as a noun

1, metal can:? A can of beans

2. listen: a? Listen to Coca Cola.

3. Shipping liquid) Metal containers and plastic containers: oil tanks.

4. Cell and toilet:? Jar (odd number only)

Second, as a verb.

1. Preservation of canned food (food)

2. Let … pack up and go, fire …