问题 从句判断（His height is double what it was...）

 His height is double what it was three years ago.请问,句式上不太明白这是什么从句?

问题 It is time you made...的用法分析

You are twenty now, and it is time you _______ the decision for yourself.A .made B. make C. making D. makes谁可以讲讲made在这句子里是什么用法？

问题 a lot of it is genetic. 介词后面加句子

There are much bigger contributors to our weight and a lot of it is genetic.介词+句子???

话题 It is sb/sth doing sth

问题 It is adj of/for sb to do sth的句子成分

It is very nice of them to help me out.It is important for us to master the cues of computers．for me, of sb 作什么成分？

问题 ​It is difficult to do sth的句子成分

It is difficult to understand what she's talking about.请问句中的to understand是什么成份？谢谢！

问题 So it is that…如何分析

老师们好，曾经看到过一句话，对其中的so it is that百思不得其解，烦请老师们分析一下：In a way we were agreeing with Langston Hughes, that blackbard of Harlem, who had written earlier:O, yes, I say it plain, America never was America to me, And yet I swear this oath...

问题 as 的用法（涉及as adj as it is to do sth）

China Daily一篇文章有一段话【You've got mail ... and it's a postcard - China - Chinadaily.com.cn】：Language is certainly a hurdle in postcrossing for many people - not only Chinese. For postcrossing to work on a global scale, a common communication language is needed so that everyone can...

问题 如何理解作表语的as never before中的介词of的用法

She is of middle height.  The matter is of great significance.请问老师，上面两个句子为什么有介词of,这表达了怎样的逻辑关系？谢谢回答。

问题 ​想与各位老师探讨一句话

But a great book, rich in ideas and beauty, a book that raises and tries to answer great fundamental questions,demands the most active reading of which you are capable.句子的主干：a great book demands the most active reading...

问题 为啥 this boy 用 it 指代

Who is this girl？She is my cousin. And who is this boy？It is me.为啥前面是she，后面是 it 啊!

问题 Whether she were right or wrong,what is it to me?

Whether she were right or wrong, what is it to me? (Kingsley)她对还是错，对我有什么关系呢？以上是英文原句，使用了were型虚拟语气。请教老师：这里使用了were型虚拟语气，如何理解全句的意思？如果改成be，则句意又发生了什么变化？如...

问题 with复合结构用法疑问

...界先进水平。 书这样翻译：Agricultural departments Have made great advances in biotechnology and basic research, with its cultivation of plant cells and tissues, with haploid breeding and application being at advanced world levels.第二个with错误吗？

问题 it is time that为什么从句要用一般过去式

it is time that...为什么从句要用一般过去式？

问题 什么情况下必须使用形式主语it

形式主语it 是用于代替真正的主语的，多半是因为主语太长，放在句首显得头重脚轻，故在句首使用形式主语it，而把真正的主语放在后面。但在有些情况下，用形式主语it和不形式主语it都是可以的。如：1. To go out at night is dange...