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问题 涉及非谓语动词用法的选择题

— Why did you call him up in advance?— _____ sure that he was at home.A. To make    B. Make                C. Making    D. Having made请问选哪个？为什么？

问题 请问这两句话的区别以及正误

I'm sorry to have kept you waiting long.A：Never mind. I waited here for only a few minutes.B：Never mind. I have been here for only a few minutes.以上这两个回答的区别在哪里呢？

问题 Downstream of ... 中的downstream是什么词性

...是名词？我知道形容词后是可以接介词短语的，像kind of you，但这里显然情况不是一样的，请问这里是一种什么用法呢？这里的downstream又像形容词，又像副词，还像名词。有哪位老师可以帮我解答一下这个疑惑吗？不胜感激！

问题 相同句型问句答案不同的困惑

...hasn't it 2) People on the scene must have taken him as a nut when he was doing a performance in the street yesterday afternoon, (didn't they) ?A. mustn't they  B. didn't they  C. hasn't they书上说答案是B. didn't they 对此，我感到非常困惑，以上2个句子属同一种类型，...

问题 动名词的完成式与一般式用法疑问

Now he regrets not having gone to university . … Mr. Smith regretted blaming his secretary for the mistake, for he later discovered it was his own fault. 按道理说都是在谓语动词之前发生的事啊？也什么不都用having done或者都用doing?

问题 句子改错

Because you are aware of people judge you by your table manners. 老师好！这个句子应该把aware of的of改成that，那能不能把judge改成judging?

问题 一道时态选择题(现在进行时还是现在完成时)

You must remember that you'll lose something in the file you ______ on and haven't saved if the computer breaks down.A. are working             B. work       C. will work      D.worked答案为a， 此时为什么用现在时呢？...

问题 关于情态动词的表猜测问题

...的将来，所以还是用might+have+done 的结构吗？这个句子：You must have gone to bed late last night. Your eyes are red. 这种句子就很好判断，因为是对过去的猜测。但第一个句子就有点理解不过来，希望老师能解答一下，感激不尽。

问题 现在完成时是否可以与一般将来时连用

有一个单选题：When I ______ this letter, I ______ it to you.A. have written, will show   B. wrote, would show答案是 A，应该如何理解？另外选 B，当做虚拟语气理解有何不可？求教各位老师。

问题 former和was/is的使用搭配疑问？

...可以用is呢？美国之音原句：Evo Dalder is a former U.S. ambassador to NATO.He has made it clear frequently that he not only thinksthat Europeans aren't doing enough, but that......上句用了Evo Dalder is a former U.S. ambassador to NATO.没有用was.因此，Mike is a teacher now, bu...

问题 宾语从句是否可以改写为方式状语从句

如 I think I will do it 改成 I will do it by i think.谢谢老师啦！辛苦了！

问题 keep的疑问

如果说keep sb away from doing sth 是阻止某人做某事，那么keep sb fron doing sth 应该是不阻止，即保持某人做某事，事实不是这样。i prevent him from cutting tree.是我阻止他，他原先来自砍树这个状态i keep就是保持，也就是不阻止,可老师还是...

问题 倒装句的问题

...算是操作词吗？这是属于部分倒装还是完全倒装？2. There comes our car.There is the book I was looking for.there前置导致的倒装，第一句话是完全倒装，但第二句话是主系表结构，be此时是操作词吗？那么它是部分倒装还是完全倒装呢？3. Dri...

问题 过去完成时可以不表示“过去的过去”吗

I've achieved only half of what I'd hoped to do. 我希望做到的，我仅完成了一半。 不太理解句子中的过去完成时，我想应该是一般过去时吧，因为这里并不是过去的过去啊！主句的 have achieved 为现在完成时，为现在时态，所以从...

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!