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问题 情态动词的用法

He did very badly on the exam. He ___harder.A.must study B.must have studied C.should study D.should have studied本题答案选D，AC为什么错误呢，不能表示之后他必须或者应该好好学习吗？肯请老师解答，感谢！

问题 such that(分析such的作用)

The shock was such that she was almost driven mad.分析这个such的作用。

问题 定语从句关系代词的省略问题

A light year is the distance light travels in a year, about 9.5 trillion kilometers.其中省略的关系代词是什么?这个关系代词在从句中充当什么成分？

问题 动词原形祈使句问题

In its place, she put twelve other flags in and around the library. Sounds reasonable, right? Wrong.请问sound 没有主语不是应该用原形作祈使句吗，为什么这里是三单呢？

问题 这里的to hear是什么成分呢

Music was recorded for the world to hear.

问题 最高级前定冠词的问题

It is best to travel by public transport if we need to live a low-carbon life.句中 “best”前为什么没有 the 呢？

问题 请问happened在这里是什么成分

But it didn't look like anything happened when I clicked on the file.请问 happened 在这里是什么成分？

问题 for可以单独引导一个句子吗

For at that point the current was dangerous.上面这句话有语法错误吗？（主要是for可以单独引导一个句子吗）谢谢老师回答。

问题 动词加介词的用法

This is the worst thing that's happened to me in all my life!老师，把happened to看成一个新的及物动词，还是to me为状语？请问及物动词，能加介词，组合成新的一个及物动词或动词短语吗？

问题 动词时态与语态选择题

Three deaths ______ in the accident.A.report B.were reported C.have reported D.reported请老师详细讲解这道题，谢谢老师

问题 翻译：由纯棉做成（由100%的棉做成）

The shirt is 100% cotton.关于这个句子有两个疑问：1. 为什么不用介词？2. 为什么不用动词？

问题 现在完成时用法

请教老师以下句子：For us this has been the most perfect way to remember her, and this is how she would want to be remembered.这里的完成时如何理解？如果是表状态延续到现在为何没有时间状语？这个完成时也不是表示事件或习惯吧？

问题 when 从句的修饰问题

He first told police his son disappeared while the family was picking vegetables.请问 while 从句是修饰 disappeared 还是 told？如果修饰disappear 如何 改为修饰 told?如果修饰told 如何改为修饰 disappear？

问题 两个up的判断

The highest climbers were San Francisco (up 12 places to 25th) and Houston (up to 30th from 41st这里的第一个有up是及物动词吗表示提升了12名次，up to这里是介词表示到了30名吗？

问题 on hearing… 是如何变化成的

On hearing that the police had finally found her...on hearing …是如何变化成的?