she must have been a temporary worker 是什么时态?there has been a tendency to romanticize the accomplishments 是什么时态?是there be 为什么中间有个has?

She must have been a beauty in her day.这句的have been 怎么理解啊,不懂.have been 不是后面+done 所有的have been. She didn't hear the phone.She ___ asleep.A may be B must be C should have been D must have been she must have been forty.变反意疑问句!They must have seen the film.反意疑问句The old man must have been a Swedish.否定句My father must have gone to work.反意 She can't have been Danish. and She must have been Swedish. Your dream will come true.She must have been wonderful. i think he must have been a mechanic,中的must和have been是什么词啊? 一道完成句子she knows this place so well ,she (must have lived) here.为什么不用must have been lived? she must have been a temporary worker 是什么时态?there has been a tendency to romanticize the accomplishments 是什么时态?是there be 为什么中间有个has? --- Where is Mary?--- She ____ in the library.A.should be B.must beC.can be D.must have been为什么D不对? must have been done must have done must have/ must have been的区别 关于must have been的用法must have been用法是作对过去的事情猜测,例如she must have been a singer但是如果有一句话是这样,he must have noticed me,我应该翻译成“他曾一定是注意到我了”还是翻译成“你本 she must have been ill.------she didn come to school yesterday .A for B because C since D as为什么用FOR 不用BECAUSE? Mary was not in her bedroom yesterday afternoon.She ______ in her classroom.A:should have been B:must have been C:must be D:should be 选哪个 为什么 She must have been tricked 是否确的说法吗?用have还是用has 为什么? she had been shopping with har mom at the supermarket.she must have been six years old,and still He looks tired,he _______ too little sleep.A must have had B must have C must have been Has she ever been late for school?I'm afraid she ___________ by someone on the way here.A.must have been troubled B.must be troubled C.had been troubled D.would have been troubled 麻烦讲一下原因最好