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问题 请问句中的as引导什么状语从句？

The hefty price underscores how Wal-Mart is trying to compete more aggressively and effectively for younger and more affluent customers as it has seen its online business growth slow despite big investments in distribution centers and expanding services.请问：句中的as是什么意思？

问题 may have done的表猜测的时态问题

If your sister has met one of the Fauns,she may have heard strange stories about me 这里按照句意 应该是表猜测，猜测不单单是能对过去时态表猜测，对现在也可以的吗？那将来呢？感谢老师回答！

问题 while从句的用法理解（2012高考湖南卷）

______ I always felt I would pass the exam, I never thought I would get an A.A. While       B. Once        C. If       D. Until本题答案为A。请问这是 while 的什么用法，句子意思如何理解？

问题 while从句的用法理解（2012高考湖南卷）

______ I always felt I would pass the exam, I never thought I would get an A.A. While       B. Once        C. If       D. Until本题答案为A。请问这是 while 的什么用法，句子意思如何理解？

问题 ...as quickly as he could是修饰什么的

He swam back to the shore as quickly as he could.as(副词）quickly 修饰谓语。as（连词）he could swim作状语吗，修饰as quickly还是谓语？

问题 分析：句尾是介词、助动词、be动词的结构

Obama is taller than me (is). This is the road which we came by.  这种结尾是什么结构呢， 具体怎么使用这种结构呢？我是英语初学者， 麻烦老师解答一下。 万分感谢。 

问题 下文的21 percent为什么放在了of的后面

a whiff below the normal amount in breathable air of 21 percent正常的百分比应该是放在of的前面，在这里为什么会放在of的后面？谢谢老师。

问题 what we can to do sth是什么结构

We should do what we can to help the homeless people.what we can to do 是什么结构、什么成分呢？

问题 如何判断介词短语是做定语还是状语

是修饰单独名词就是定语，修饰谓语就是状语？那The scholar calls for more public services to meet these people's needs in employment.译文：这问学者呼吁，公共服务应该能满足这些人应聘的需求。这里的 to meet these people's needs 是修饰公共...

问题 定语从句关系词(which与where)

...的那个图书馆，碰巧遇到了我的初中同桌。（It）It was in the library which I often go to read books that I met with mydeskmate of junior high school.（which的位置应该是where）为什么这个定语从句要用关系副词引导，为什么前面已经有介词 in 了后面...

问题 computer的可数性（可用作不可数名词吗）

Jack likes _____(computer). He is studying in the lab.参考答案竟然是computer，单数形式。查看了手头的词典，没有发现可以用作不可数名词。难道在此是指电脑技术，要么答案是错误的，应该改为复数形式computers?盼望专家指导，解惑。

问题 ​I am devastated that...的语法正确吗

I am devastated that 80 years of my life is at risk of being undermined,in the blink of an eye,by Thursday's media reports.devastated that 有这种用法吗？请老师解释一下意思，谢谢。

问题 新概念3 Lesson 5的句子连接问题

He sent yet another fax informing the journalist that if he did not reply soon he would be fired.这句话里的sent yet another怎么理解?soon he would be fired是怎么和前面的he did not reply连接在一起的？

问题 过去时与过去完成时区别

We ______ that the books ______ in two days.A. told; could delivered            B. are told; should deliverC. were told; would be delivered     D. had been told; should be delivered请问这道题为什么不选D？

问题 south of 前面加限定词的意思

The beauty of our country — or at least all of its south of North Scotland — is as hard to define as it is easy to enjoy.south of 是....南面，加了个its（表示country的）怎么理解呢？这个国家南面的北苏格兰？