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问题 on proof of是固定搭配吗

The cheque will be cashed on proof of identity. 这张支票凭身分证件兑现。 请问句中的 on proof of 是固定搭配吗？它是“凭借”的意思吗？我怎么在词典上查不到啊！

问题 动词hide与主语是被动关系吗

Hidden behind a tree, the boy could not be found.这个句子是过去时吗？分词部分不能确定时态，could 和 can 都能用在现在时，请问老师这种情况怎么判断时态？Boy 应该是自己藏起来的呀，怎么用过去分词呢？

问题 英语难句语法分析

The human genome contains 3 x 109 base pairs of nucleotides, including 140000 genes, if any one of these genes mutate, may lead to its coding protein structure and function unusual, and also cause a kind of important disease, genetic disease. 老师，麻烦您帮我看一下这句话的语...

问题 不定式省略to的用法问题

Much of the language makes it sound like a precise science.  其中 sound 前是否省略了不定式符号 to？为什么可以省略不定式符号 to？什么情况不定式作宾补可以省略不定式符号 to 呢？谢谢!!

问题 这个句子也是省略了主语it吗

看到前面有网友提到句子可以省略主语 it。我也有一个句子，好像是省略了 it，但又说不通，请老师分析一下，谢谢！Isn’t posting the letters your work?

问题 英语中逗号、分号、句号的区别

If you lose your job, I’ll lose mine; so we’re both in the same boat. 假使你失业，我也会失业，所以我们是“难兄难弟”。请问：这个句子 so 前面为什么用分号？这个分号用得对吗？为什么不用句号或逗号呢？在类似情况下，英语中逗号、...

问题 一个英语复杂中的where从句的理解

The attacks on ambition are many and come from various angles; its public defenders are few and unimpressive, where they are not extremely unattractive.请问如何理解中的 where？

问题 句末的a changed man是什么成分

My father came back from the war a changed man. 请问这个句子中的 a changed man 是什么成分（不会是状语吧）？整个句子是什么意思？

问题 是补足语还是状语？请详解

It is not necessarily a selfish notion,because achieving the dream is assumed to make America strong.不定式是作目的状语还是主语补足语？还要一个简单的句子 I saw him taking their children to college.to college是作taking的目的（地点）状语，还是作宾语补足语...

问题 现在进行时表示感情色彩的用法疑问

老师，现在进行时常用来描写一种状态，往往显得生动，具有感情色彩，在这种用法中还伴有正在进行的含义了吗？The sports meet is going well.I am missing you very much.

问题 hear sb do/doing的区别

We often hear some students ____ spoken English in the English corner.A. practice  B. practicing根据语境感觉填B合适，但是又觉得AB两个都可以，盼望专家老师解惑。

问题 while 的用法

—I'm going to the post office.—_______ you're there, can you get me some stamps?A. As    B. While   C. Because  D. If答案为B. 有的解释说是引导让步状语从句，不对吧？这里的while是当什么时候讲还是既然的意思？两者说法网上都...

问题 what可以引导非限定定语从句吗

North Korea fired four ballistic missiles in the early hours of Monday morning, in what Japan's leader described as "an extremely dangerous action."上句中的what引导的是非限定定语从句吗？

问题 句子成分分析（and again是什么用法）

The postcard is marked 1916 and again September 2010 when it was stamped to arrive.这个句子中 and again 是什么用法？还有那个 when 引导什么从句？

问题 including等于which include吗

It’s best to contact a guide to learn about accessing these falls, which include those further upstream in the Seven Sisters group.上文中的 which include 可以换用 including 吗, 是所有的 including 都可以换成 which include 吗？谢谢老师回答。