MAY CAN MUST COULD MIGHT表示推测时的用法

题目

MAY CAN MUST COULD MIGHT表示推测时的用法
哪个语气强 哪个弱要说明
还有具体用法

答案

may 可能..(它的可能性要比might大)
can 能,有能力做某事..(没有任何推测的意思.)
he can understand her meaning.他能理解她的意思.
must 一定,是对某事百分百地肯定..he must have finished homework."他一定做完了作业"../ tomorrow will must be rainy.明天一定有雨.
must 也有"务必,必须"的意思.表强制性.you must do it!/
could 用于虚拟语气中.或是委婉的语气中(希望能得到别人肯定回答的).和can的意思一样."能".
If I could go with you,I should feel very glad.如果我能跟你一起去,我会很高兴的.(但事实上没有跟着去.这就是所谓的虚拟语气.)
could I borrow you pan?(这里就是委婉的语气,比用can更客气些.多用于生人之间).
could 也是can的过去式形式.