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问题 until的时态问题

...国人。为什么这句主句用过去完成时？2. I didn't manage to do it until you had explained now.直到你解释了,我才会做。为什么该句主句用一般过去时，从句用过去完成时？3. He didn't leave the office until he finished his work.他完成他的工作后才离开...

问题 现在分词短语后置是做状语还是做定语

...s at the nation's airports, telling arriving and departing traffic what to do. 请问这句话中的telling分词短语是做状语（逻辑主语是ATC) 还是做定语（逻辑主语是controllers），谢谢各位老师!

问题 -ing分词的成分判断(是作目的状语吗)

A: There's a cat trying to get in, shall I open the window?B: Oh, that cat is always coming here cadging(求食).  (摘自章振邦《新编高级英语语法》p.322)逻辑上，这里的-ing分词分句cadging如何分析为宜？但是，一般认为，除了go doing外，-ing分词分句不作...

问题 这道题选择一般将来时还是现在完成时

The children are to do their homework the moment they ______ back school.A. have arrived            B. had arrivedC. will arrive                 D. would arrive这道题选择一般将来时还是现在完成时？

问题 关于比较结构中as的词性的问题

...是介词呢？如果是连词，可否理解为as the dead rat后省略了do呢？以此类推，是否比较结构引导比较对象的最后一个as都是既可看作连词又可看作介词（在引导对象后无动词时）呢？

问题 ​从句的情态动词选择

-Do you think his story        true?-I don't think so. But it sounds good.A. must be    B. may be    C. can be这道题该怎么选？请问主句的疑问语气会影响到从句的情态动词的选择吗？另外，想请教曹...

问题 老师好！请教一下than后省略的问题

...is taller than I am. Tom can run faster than I can. Tom runs faster than I do. 那么than后是可以加一个主语+be、情、助的结构吗？

问题 为什么用would have lived

... lived anywhere with him.请问这句话最后的为什么要用would+have done形式而不是would do形式？这是推测还是虚拟语气？说话人的立场是现在还是过去呢？

问题 关系代词what能省略吗

...le person because he always has the courage to speak out he knows is true, do what he feels is right and fights for what he thinks is unfair.他是一位值得尊敬的人，因为他总是有勇气说出他所知道的真相，做他认为正确的事情以及对抗他所认为不公平的事情。...

问题 otherwise理解

FEMALE PROFESSOR: So now, the question is, do we partially restore and rebuild the site before-the entire thing disintegrates?FEMALE PROFESSOR: It will take a lot of funding to restore it, and, uh, I'm not sure it will be made available. Which would be a pity.FEMALE PROFESSOR: Eve...

问题 for和to的用法区别

...的square不是名词吗？为什么可以放在to后面？不是like to do sth.吗？谢谢！

问题 like用作连词可以引导表语从句吗

...以用作连词引导状语从句。如：Pronounce the word as / like I do.Mike and Sarah are going to Paris for the weekend, as / like they did last year. 但它也可以引表语从句吗？若可以，请举出 like 用作连词时引导状语从句的例句加以说明。我说的是...

问题 if 从句中到底该用some(thing)/any(thing)

请问下列不定代词如何选择：The polic haven't confirmed if the man has _______ to do with the murder.A. something   B. anything

问题 workout是名词,workout在句子中的使用，是否有错误

How do I workout my biceps?老师，例句是出自某本日常句型的句子。我觉得：workout是名词，可能有误。查过英语词典work out：训练，是phV,是不及物的，如何把这句话改正过来？

问题 一道题目引起的关于几个副词用法的辨析困惑

I might fail, but I will keep doing it _______. A. however          B. anyhow           C. whatever           D. yet请教各位老师：所有的四个词都可以表示“尽管如此”、“即使这样”、“不管发生什么”的意思。该如何辨析？答...