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I know the city where he came from？请问为何在came后能接fro
where=介词+which，但这里介词不包括from， 也就是说where不能表示来源地。所以当需要表示来源地的时候，就要说from where。
回答于 1秒前
就Cats are a good topic.来探讨复数主语单数表语/宾语的情况
我觉得Tigers are a dangerous animal.这句话欠妥。应改为以下三种之一：Tigers are dangerous animals.A tiger is a dangerous animal.The tiger is a dangerous animal.
回答于 1秒前
请教as引导的倒装让步状语从句应前置哪些成分？
（1） Difficult as it is to believe.(2) Praised as he was by them, he remainedmodest. (3) Lazy boy as he is, he is kind to help others.(4) Help him as I did, he still failed.
回答于 1秒前
这个on which引导的定语从句应该如何理解？
the Battle of Britain = 不列颠战役decision = 结论、结果 a report explaining why a legal or official judgment was made in a particular wayturn on/upon sth. = depend on/upon 取决于on which decision the Battle of Britain would turnwhich的先行词为the exchange rate in fighterson which decision = on...
回答于 1秒前
动词时态问题
would rather (had lived) 100years agowould在此为情态动词，后接不带to的不定式，所以had lived应为have lived. 即：she would rather have lived100years ago.或者would rather后接从句：she would rather she had lived 100years ago. (此时would为及物动词，古用法）
回答于 1秒前
非谓语做宾补用法
你的理解是错误的。see sb do sth. 表示看到动作的全过程。动词不定式为短暂动词。see sb doing sth. 看到正在发生、还没有结束的动作片段。即使你每天都看到某个动作片段，你也要用现在分词作宾补，而不是用不定式。例如：I often see a man jogging around the lake in the park. 所以，你上面句子中用sitting是正确的，...
回答于 1秒前
当主句含有动词do时作表语的动词用不定式还是动名词
All you ever want to do is going shopping with your friends. Don’t you have any other hobbies?解答：从蒋老师的解答中得知此句曾为北京的考试题。出题人显然试图考查学生对动名词和不定式用法的掌握情况。一般说来，不定式用表示将来的还没有发生的一次性事件，而动名词多用于已经发生过的事件，或不含时间意义的抽象...
回答于 1秒前