问题 until从句用一般过去时与过去完成时的问题

想问一下，这两句哪个是对的？He didn't go to bed until he had finished his homework.She didn't go to bed until she finished her homework.

问题 状语分析

From a rooftop cafe, one can see the Sun and Moon towers on Fir Lake as the city sprawl continues into the distance, giving way to bright green forests and hills, the stunning landscape Guilin is famous for. 请问giving way to bright green forests and hills在这里做什么状语？

问题 非限制性定语从句介词加关系代词的用法

...吗？3.以上这些句子怎么判断是非限制性还是限制性定语从句？

问题 under which there was...是介词后接的宾语从句吗

...ere was a basket containing three men 我认为是 under 后接的是宾语从句（介宾结构），对吗？第二句中two of the men如何理解？是指的一些人中的2个人吗？期待老师解惑，感谢！

问题 educate sb on sth（on sth是方面状语吗)

educate sb on sth，其中on sth是方面状语吗？ 表示 “ 关于.....” 时，是方面状语吗？ 谢谢老师！

问题 it must invest在这里是定语从句，但是it指代什么呢？

...教：it must invest 怎么解析？应该是省略了 that 的定语从句，修饰前面 capital，但是其中的 it 指代前面什么呢？the cost of the capital it must invest 完整的还原一下怎么写呢？ 可以分析下 it must invest 这个定语从句本身的句子成分...

问题 伴随状语分析

当前后主语一致时，用的doing是表进行吗？还是只有when doing是表进行？

问题 宾语从句中的时态选择题(主句为一般过去时)

I didn’t know you _______ here.A.will be      B.have been       C.are        D.were

问题 If you ever…中的ever如何理解

有时在 if 条件状语从句中见到用 ever，但不知道这样用的 ever 是什么意思，如何理解？属于什么用法？比如：If you ever visit London, you must come and stay with us. 你要是到伦敦来，一定要到我们这里住住。If you ever need anything, please don’t...

问题 同位语从句

An awareness that they were being experimented upon seemed to be enough to alter workers’ behavior by itself.为什么这里的同位语从句upon后面没有宾语呢？

问题 定语从句问题

It’s not just kids who are already overweight getting more and more so, there is an entire shift.这个句子中能否把kids后面的who去掉，在just 后面加that变成表语从句呢

问题 such as 后面的是定语从句吗

There must be something dashing and fast in his appearance, whereas his costume was perfectly plain,the expression of his face grave and earnest ,his address perfectly unaffected and such as we might expect to meet with in a well-bred man somewhat advanced in years.  句子里的such as 后面...

问题 关于句子的歧义

Remove the pressure to squeeze in more patients. 此句是否有歧义？关键是后面那个不定式究竟是目的状语还是修饰pressure的定语？目的状语与不定式的定语该怎么区分？

话题 过去分词founded作状语

话题 现在分词短语作条件状语