All that must be done ____(do).答案是have been done,为什么是这个答案?这句话是现在完成时吗?

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• All that must be done ____(do).答案是have been done,为什么是这个答案?这句话是现在完成时吗?
• 新概念英语中的几个问题~第三册中有这个题目：The experts were now fully convinced that the animal ____ a puma A.must be B.should have seen C.can only be D.could only have been.我选择是是A 但答案是D为什么啊还有个.The woman saw"a large cat "___five yards away from her.A.at least B.four or .C,no more than D.within为什么不选择D啊,C为什么有可以.I——it all night.but I'm afraid ...A.shall mend B.am mending C.have mended D.mended 为什么不选择AWe will get used to ___ that .BILLA,hearing B.hear C.the sound D.having hea
• 完成句子.I'm so sorry______at such an awkward time,but I really had something urgent to tell you.(call)我真的很抱歉在这么不合适的时间给你打电话,但我真的有急事告诉你.have called you,请问为什么要用have done,不能只用do吗How can you ask again?I think_____at all when I presented the answer to you.(listen)你怎能再问一遍?我认为当时我在讲解答案时你根本没听.答案是you were not listening,请问为什么不用情态动词表推测?
• ①Who jumps highest in your class?—john ____.A.has done B.did C.does D.do我认为是选B 可答案是选C、 可跳高不已经是过去式了吗?②Today the forests have almost gone.People must____down too many tress .A.stop on cutB.stop from cuttingC.be stop to cut D.be stop from cuttingC③We must do everything we can ____ waste water from running intorivers.A.keep B.kept C.to keep D.keeping can 不是情态动词吗?后面难道不是接原型吗?④ She counldn't __ her words ___by the students.A.get understand B.get understood C
• 3道英语题 追20分We all thought that he was much stronger than ___A he was looked B he looked at C he looking D he looked答案D我想问A为什么不行..我的理解是than到底是并列连词么? 如果是前后不是要一致么形式?Has all ___ can be done ___?A what..done B that...been done C that...already done D what ...already been done答案B..我想知道为什么D错..难道不是主语从句么I ___ you ___ so early.A don't expect...will comeB didn't expect.would comeC don't expect...have comeD didn't expect...will come答案B 我想知道D为什么不行...will come 不是讲现在
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• 非谓语动词的一些语法问题1.I think it useful to learn English well.作宾语的不定式可换成动名词吗?I think it useful learning English well.2.形容词后不定式省略是例如Is she too eager to do that thing?Yes ,she is too eager to.3.是不是Vt后面跟宾语,Vi后面跟状语?4.My wish is to become a scientist.become 在这里是系动词吗?5.Given more time,I will finish it.这里条件是被动,那条件主动该怎么说?例:如果你能吃完这个西瓜,你将是胜利者.6.doing,having done,to have done这三者在作宾语,状语的区分.7.插入语是状语吗?为什么是独立成分?(独立成分不是指独立主格吗?)例:to tell the truth,juding by his clothes.8.现在分词
• 求教2道关于现在分词做状语的英语题目,谢谢1.When _______,the bridge connecting the island to the continent will be open to traffic next year.A.completed B.completing C.being completed D.to be completed我选择的是C,可是答案不对,我想不明白的是 这里的When不是时间状语吗?那为什么不能用being done?2._______of danger in the street at night,she had to go home,with a friend_____A.Warned , followed B.Warning,following C.Having warned,following D.Having been warned, following我这个选择了A.可是杯具的是答案也不对. 求解释这是为什么.
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• to have done 看看吧The new power station is reported ______ within three yearsA to have completed B to have been completedC having been completed D to be completed请问:这个题目应该选什么呢?我选的B 但错了,D是正确答案.它们应该怎么区分呢?to have done 应该怎么用呢?为什么我选B 就错了呢?
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