she must have arrived there yesterday .这是什么时态

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• she must have been a temporary worker 是什么时态?
• 语法题高中的don't bother me.do what you(will);i don't care.为什么不用would likeit has been suggested that people who watch television incessantly(may become)over passive.为什么不用should becomethey (may have arrived )home by now.let's telephone them again.为什么不用must arrivedavid is waiting alone in the waiting-room.you(ought to have told)him yesterday about the change.为什么不用ought to tell(can)anybody else give correct answers to these questions?为什么不用musthe told me i (mig
• 27.i saw ann inthe library yesterday.You ____ her,she is still abroad.A)could not seeB)cann’t have seenC)must not haveseenD)had not seen请问为什么选择B呢,
• 关于英语反义疑问句的两个选择题1.asturonauts haven't found any living things on the moon,have they?2.she must have arrived there ,didn't she?请问这两句话的反义疑问部分为什么不一样呢?什么时候用have什么时候用did呢?
• 这是我儿子的一则日记,有语法和时态错误的指出来.还没打完she was silent,and she had a smile on her face.the other girl on her right said:"we didn't like the windows open,did you have idea?we made you close to windows,you must close them.you had a big mouse.why were your words so much?you close your mouse.i didn't think of you say." .i thought of she is a bad student,i was silent,i didn't like speaking to her.waited a moment,i wanted to drink.some water fell down the ground when i
• Jenny is only three years old.she is too young______alone at home.A.to leave 动词不定式一般式主动形式B.to be leaving 动词不定式进行时主动形式C.to be left 动词不定式一般是被动形式D.to have been left 动词不定式完成时被动形式答案是C,但我的疑问是D为什么不行?她被留在家里,因此可以排除AB,那么CD都是被动形式,只是时态不同,在这道题中该怎么判断呢?是因为she后面的be动词已经是is了,所以就代表这是一般式吗?
• 1.What's the matter with her?She says that she have got headache.请问回答中的have是否要改成第三人称单数形式has?可是has是have的第三人称一般现在形式,got又是get的过去分词和过去式,has和got放在一起是不是矛盾.如果可以,这句话就是主语+has+过去分词+其他 那这句话算不算完成时态?现在完成时态为什么会有has这个第三人称现在式?这是不是很矛盾?
• 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?
• now that she is out of a job,mary__going back to school,but she hasn"t decided yethas been considering 露茜还没决定就是正在考虑中选项中就是填这个,我想问的是 这到底是什么时态.如果是现在完成进行时不是用的是having been considered,这是我想的 ,我的假说成立吗have(has)been v+ing 现在完成进行时中 这个been是个什么成分
• 用had to 或 must have been填空.He didn't come to work yesterday.He ____ill.He didn't come to the office this morning.He ______stay at home.I don't think she was Austrian.She _____German.I lost my pen so I _____buy a new one.He forgot his case so he _______ return home.She didn't hear the phone.She _____sleeping.请说说他们有什么区别.
• She must have left the town for home at Albany,for she did not show up at the party last night.为什么不用 had left?
• Your mother must be cooking in the kitchen,的反义疑问句 用isnt she?还是doesn't she?为什么