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问题 since后接短暂动词一般体和完成体的语意理解

Since he joined the army,he has been in much better health.此类句一般表示，从句提供从某个过去时间点到现在的一个时间框架，主句开始发生于此时间框架内的一个模糊时间点。教辅书中提到此句有暗含的语意(他可能现在仍在军队里，也可...

问题 什么时候主从时态一致(什么时候主从不一致)

...First, I had to think very carefully about which courses I wanted to take. The school adviser helped me choose the suitable ones: maths, English, chemistry, world history, and Chinese. I know that Chinese is a very difficult language, but I hope to be fluent when I graduate.My adviser recommended th...

问题 遇到既可以当介词又可以当连词的词后面接的doing是动名词还是现在分词

遇到既可以当介词又可以当连词的词，怎么区分后面接的doing是动名词还是现在分词?I need more practice before taking the driving test.句子里的 before taking the driving test为什么不是介词引导动名词作状语，而是连词引导的现在分词作状语?

问题 既是连词又是介词的词引导的从句中的动词形式问题

1.①After exposed to the sunlight for too long,your skin will become dark . ②After being exposed to the sunlight for too long,your skin will become dark. 请问 这两个句子的区别是什么？ 2.引导状语从句的“引导词”既可作连词也可作介词(如after，before，since...

问题 very much alive的理解/take down, pull down的区别

...什么成分？为什么可以修饰形容词？ 2.Where did you get these doors? From the old houses which were _____ by the _____ workers. A. taken downB. pulled down 教材给的答案是b，但我感觉AB都可以，请问老师这两个有什么区别吗？

问题 having done可以作定语吗？

（2004·江苏）The old man, ____________abroad for twenty years, is on the way back to his motherland.      A. to work             B. working          ...

问题 持续到现在的动作可用一般过去时吗 和现在完成时的区别是什么

... 今天查阅earnings时看到 麦克米伦的一条例句：      Over the last decade, earnings rose faster than prices.      我读PEU的相关讲解，与一段时间连用的是现在完成时：I have know her for years.      麦克米伦的例句可改为 完成时吗？     Over ...

问题 形容词后面的反射不定式是什么状语

...接反射不定式时，这个反射不定式是什么成分啊？比如：The book is difficult to understand. 这书很难懂。He’s very easy to get on with. 他容易相处。The boy is impossible to teach. 这孩子不可教。This long sentence is hard to understand. 这个长句子很难理...

问题 这是两个时间状语还是后面的时间短语作定语修饰前面的时间短语

...师证明第二个时间结构是定语，或承认其也是时间状语。The submarine was found on August 11, about 15 hours after it had departed Copenhagen. （By Susanne Gargiulo, Katie Polglase and Laura Smith-Spark, CNNUpdated 1213 GMT (2013 HKT) October 7, 2017） Clark Count...

问题 it指代什么(为什么需要一个it来做形式宾语)

...______ if you were watching your favorite TV program and someone came into the room and just shut it off without asking you?A．them        B．one        C．those        D．it本题答案选D，答案解析写的是 it 做形式宾语指代 if 后面的句子。请问老师...

问题 call sb to do sth与call to

请问下面两句的意思有何区别？ He called the driver to stop. He called to the driver to stop. 当然，以上两句的根本区别在于call sb to do sth与call to sb to do sth的区别。

问题 Which do you enjoy to do sth/doing sth句式分析

..._（度过你的业余时间）, playing cards at home or taking a walk in the park?  (spend)可以理解正确答案是：不定式做目的状语。但是为什么不可以填spending 呢？You enjoy spending your spare time in playing cards at home or taking a walk in the park.这样不...

问题 Fridays和Saturdays怎么会是nights呢【续】

...s其实是指Fridays and Saturdays的“晚上”）又如：Meetings, and the time for them, are a considerable management expense. 会议及所费时间是一笔颇大的管理花费。（《牛津英语搭配词典》）此处的 meetings 以及the time for them 其实是“会议”以及“所...

问题 Never before置于句首的倒装以及before的词性问题

...作为 adv 时的用法让我不解：It's interesting that he sent me the book twenty days before the deadline for my book.(1) 这里的 that，就是所谓的形容词性从句还是主语从句？(2) 为什么这里是副词，后面有名词啊？谢谢，如有相关例句更好！

问题 promise后的宾语从句只能用将来时态吗

...时、过去将来时）。如： He promised (that) he would help us in the work. 他答应帮助我们进行这项工作。 She promised that she would write every week. 她答应过会每周写信的。 I promise I’ll pay you back, on my honour. 我以人格担保，一定把钱还给...