Can is used in affirmative sentences to also speculate

In the affirmative sentence, must is used instead of can, so can does not indicate speculation in the affirmative sentence.

I'll tell you about an example question.

Take a look at the next question: You be right, but I don't think you are.

a. can b. could c. must d. should

From the contextual point of view, c and d should not be chosen, and in the remaining a and b, many students take it for granted that a is selected, thinking that the whole sentence is in the present tense, so they choose can instead of could. But it's B, not A. According to English grammar, the modal verb can.

According to English grammar, when used to speculate on the possibility of representation, it is usually only used in negative or interrogative sentences, but not in affirmative sentences; However, when could is used for expression, it can be used not only for negative and interrogative sentences, but also for affirmative sentences, and at this time, could is not the past tense of can, and there is no time difference with can, but the tone of could is more euphemistic than can. By the way, can can be used in affirmative sentences in the following special cases. One is the possibility of abstraction, i.e., it is theoretically or logically possible to analyze, but not necessarily in practice.

For example: anyone can make mistakesAnyone can make mistakes.

The second is followed by the adjective ", which means "sometimes", "often", etc. For example: my father can be very unreasonable

My father was sometimes very unreasonable.

can is not used to denote speculation in affirmative sentences, and may might could in affirmative sentences is used to denote possibility.

Can is sometimes translated as possible in affirmative sentences, but its meaning is to indicate objective possibility.

For example, life can be difficultLife can be hard. Although the translation is possible, it is not speculation.

The team will answer for you, welcome to ask.

Coupon usage.

It is often used in clauses (past, then) to be able to, to be.

Used in the subjunctive mood in the bridge of reputation, indicating the opposite hypothetical can, originally take the ant can.

Indicates the possibility of can, maybe, can.

Used in a euphemistic tone can, can.

willbe means to become, to be ......

Let's see what others say.