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问题 The machine will stop if destroyed

The machine will stop if destroyed为什么这里if 后面直接跟destroyed过去分词呢，为什么不是if it is destroyed？

问题 这句话里的as起什么作用

My husband is freelance : he works for several different  companies as and when they need work done – he’s a computer programmer.这句话里的as起什么作用？感觉是多余的。

问题 请问make evident是一个倒装结构吗

Many participa nts and commentators emphasised that greater transparency in markets is needed to mitigate the impact of volatility, and make evident whether adequate stocks and supplies are available.

问题 这是what引导的什么从句

The current base Medicare Part B premium is $121.80 per month per person, and a Medigap plan to help cover what Medicare won't can easily cost $250 per month or more,as well.为什么won't 和 can可以连用?这里是what引导的什么从句?

问题 make sth possible的用法

Thus, the anthropological concept of "culture", like the concept of "set" in mathematics,is an abstract concept which makes possible immense amounts of concrete research and understanding.固定搭配是make sth possible, 句中把possible提前，变为make possible sth是什么用法？

问题 如何判断主句谓语与定语从句非谓语关系

Phase I is ushered in by the effect which occurs immediately after you take the medicine.比如这个上面，occurs 非谓语动词与主句谓语ushered in 是同时发生吗？还是有先后？这种应该如何分析？

问题 which定语从句先行词疑惑

When the writer talks about dissecting the Great Bear (aka Ursa Major) and driving Charles's Wain, which comprises the Big Dipper, he is referring to the field of astronomy. 请问老师：which comprises the Big Dipper 的先行词是Charles's Wain吗？comprises表示什么意思？

问题 强调句动词的时态以及是否可以与情态动词连用

It is…that…这样的强调句，be 的时态除了用一般现在时或一般过去时外，还可以用其他的时态吗？可以连用情态动词吗？

问题 narrow sth down

...r variant of hypnagogic jerks. Unfortunately, the spectrum of explanations is so broad that it really doesn't help narrow down much at all.这句话最后的much是做narrow的宾语还是修饰at all?

问题 helpful to do

在某教辅材料中遇到这样一句话：Listening to English speeches and watching English movies are helpful to improve English.我觉得这里的helpful后用不定式是错误，此错误就类似于我们不说We difficult to make progress而说It is difficult for us to make progress.应该...

问题 如何理解一个短句中的两个that从句

今天听一个英语节目，说到一个句子：It would be foolish to do the thing that everyone considers that it is wrong.请问如何理解句中的两个that？

问题 请问如何理解和翻译粗体部分的句子？

After ten thousand years, the planet would still be something like fourteen degrees Fahrenheit hotter than it is today.请问如何理解和翻译粗体部分的句子？

问题 I'm here是插入语吗？

There's an even greater need for professionals to be effective,which is precisely what I'm here to help them do! 请问如何理解

问题 英语的单引号与双引号用法

我们一般的习惯是双引号里面套用单引号吧，对不对？但我看到这样一个句子，是单引号里面套用双引号：He said, ‘It is your book “Missing You All” that saved us.’请问这个引号用得对吗？

问题 连词because能和后面的分句独立成句吗

作为连词的 because 不能和后面的分句独立成句吧？但是为什么会有 That is because...连词（conj.）中，是不是只有 because 能这样用？