作业帮must have+P.P 与may,might could have +p.p的区别 may have +P.P.might have +P.P .could have +p.P 之间的区别
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must have+P.P 与may,might could have +p.p的区别 may have +P.P.might have +P.P .could have +p.P 之间的区别
must have+P.P 与may,might could have +p.p的区别
may have +P.P.might have +P.P .could have +p.P 之间的区别
must have+P.P 与may,might could have +p.p的区别 may have +P.P.might have +P.P .could have +p.P 之间的区别
must have+P.P是表示对过去发生的事情的肯定推测,“一定已经.”的意思.如：I didn't hear the phone,I must have been asleep.(我没听到电话响,那时我一定是睡着了)
may have +P.P.might have +P.P 表示对过去某事做可能性推测,might与may同义,只是其可能性比may更小.如：He is late.He maight have met an accident.(他迟到了,或许出了意外)
could have +p.p通常用否定形式could not have +p.p,或疑问句,表示对过去事情否定或疑问的推测.
must have+P.P 与may,might could have +p.p的区别 may have +P.P.might have +P.P .could have +p.P 之间的区别
求懂英语的解释一下这些分别是什么时态1.{isbe {am + p.p（过去分词）{are2.be {was +p.p{were3.have/has been + p.p4.will be + p.pbe going to be + p.p5.must/may/need/can/should/ + be + p.p6.{isbe {am + being + p.p{are
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从公式p=m/V,p与m成正比,与V成反比,对吗?