问题 one half与a half的区别

About ________ of the surface of the earth is covered by water．A. two-thirdB. three quarterC. seventy percentD. one half答案 D 为什么不行？a half与one half 有何区别？谢谢！

问题 is not exist / does not exist 的疑问

Sorry, the page you visited is not exist!exist是动词，为什么这里是【is not exist】而不是【does not exist】呢?

问题 不定式表将来和现在分词表进行的疑问

老师在分析题目时经常说：不定式表将来，现在分词表进行。但我觉得这个说法不一定对。比如：He likes to laught. 这个句子并不表将来。又如：Seeing me, he ran away. 这个句子也并不表进行。

问题 face to face 的用法分析

老师好：请教一下。   下面的例子出于《柯林斯高阶英汉双解词典》   例    I was gradually being brought face to face with the fact that I had very little success.   问题：这里face to face 是起什么作用？如果没有这个...

问题 不理解句子中的逗号(those who can,...)

I would appreciate it if those who can, would stay on here for another night or so.这个句子是什么意思？为什么句子中间有个逗号？

问题 名词连用 要不要加冠词的问题

The difference of thermal insulation capability among the Structure I and II. 在thermal insulation capability前要不要加冠词呢,为什么?The term  represents soil heat flow of the modified SC by heat conduction. 在soil heat flow和he at conduction前要不要加冠词,为什么?

问题 名词和不定式的关系是什么(​someone to call)

someone to call；what to say这些都是名词搭配不定式，不定式是定语、还是动宾、或是其他？

问题 对于已发生的事情可以用一般现在时吗

A ball_____ (fly) into the room through the window. 答案写着两个: flies/flew 既然发生过的事，用一般过去时很好理解，但是，flies怎么理解？用flew更好吧？

问题 won't与wouldn't的区别

I thought my computer crashed. it  _______ start, no matter how hard I triedA．shouldn'tB．needn’tC．mustn’tD．wouldn’t答案为d，什么用法。如果有won‘t可以么？区别是什么？谢谢！

问题 ask...for...(这个for后面的结构是宾语补足语还是双宾语)

问题 这里的scratch究竟引申或比喻成什么意思呢

I'm afraid she'll stand me up when it comes to the scratch.老师，请教一下when it comes to the scratch中， scratch引申或比喻成什么意思？ 查询各种词典，都没有找到。

问题 It is the first time的疑问

it’s the first time they are living away from home and are of the legal drinking age. 这里为什么没用完成时？it is the first time 一定要用完成时吗？

问题 在哪些情况下and前面的名词加定冠词，而后面的名词可以不加冠词？

问题 一道关于比较句型的选择题

Moving from beginning to end by order of time, narration relies on a more natural pattern of organization than ________.A. will other types of writingB. do other types of writingC. on other types of writing D. other types of writing感觉选择 B D 都可，各位老师看看可以么

问题 that的省略问题

...n that,   considering that,  now that,  seeing that, 这四个连词后的that可以省略吗？是否前两个可以，后两个不可以？比如：Given (that) you are all here, I will show you round.Considering (that)  he is a child, we let him go.Now (that) you are all here, let's try and ...