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问题 Be taken up doing 结构

All my time is taken up washing clothes.  请问老师，sth be taken up +doing 是什么用法？是sth be taken up in doing省去介词in的用法吗？ 为什么不是 sth be taken up to do ? 

问题 than are average 的说法对吗

最近专门看了专家们关于 than 用法的解答和文章，很有收获，但这个问题太难，所以仍有一些疑问，请教各位专家。请问下面一句对吗？She is working harder than are average.对错与否，请专家帮忙分析一下，谢谢了！

问题 关于无动词分句

　　有这样一句话：A broker is one that acts as an agent for others, as in negotiating contracts, purchases, or sales in return for a fee or commission. 请问这里的 as 是连词吗？如果是连词，请问为什么它后面直接跟着一个介词词组 in negotiating contracts, purcha...

问题 so的用法（perhaps catastrophically so）

老师们好，句子最后perhaps catastrophically so中，so指什么呢？But there is a risk that such changes will make some plant infections more common in all climatic zones, perhaps catastrophically so.

问题 be dressed up in 的理解

My sister is dressed up in a red jacket today.1. 请问为什么 dress 这个动作会是被动?  2. dress up  in 相比 dress up / dress in 有什么不同吗? 

问题 going on在句中充当什么语法成分

There is generally very little unnecessary work going on in a good company.曹老师您好，句子中going on是作动名词修饰work充当名词短语，还是现在分词作状语？

问题 philosopher 后面为什么用which而不是who

Because I'm a philosopher which is no recommendation.philosopher 后面为什么可以用which来引导定语?

问题 不定式作表语省略to

Now all we have to do is help ourselves and to pray to God.此句有语法上的错误吗？为什么help前不加to，如果照不加to的理解来看，它and后面为什么又加了to，这是什么语法知识，我才疏学浅，请老师帮助一下，谢谢。

问题 while doing sth的用法

while doing sth的意思是“当做某事的时候”，请问它是whle sb is / was doing sth的省略形式，这种省略必须要求主句与从句的主语一致吗？

问题 cucumber为什么没用复数或连用冠词

前面见到有老师在解答《be good for doing sth 和 be good to do sth 哪个对》时给出了这样一个例句：Cucumber is good for soothing tired eyes. 黄瓜有助于舒缓眼部疲劳。

问题 be essential to doing sth的用法疑问

Practice is essential to becoming good at something.老师，请问这里to 后面为啥加ing形式的becoming 呢？谢谢。

问题 现在分词作结果状语时逻辑主语问题

...是前面整句话。这可不可以理解成分词做定语省了 which is？

问题 ever to be undertaken 是什么意思

This is only new edtion ever to be undertaken since NCE was originally published.ever to be undertaken 是什么意思？表示“曾经被担任的”？初来乍到，没有鲜花，谢谢帮忙!

问题 形容词(作表语移到句首的倒装

Even more interesting is his film, telling a very strange story.这里为什么要把作主语的形容词放到句首来引出倒装?

问题 同时有主语从句和表语从句怎么分主句和从句

What cost him his life was that he was too carelessWhat I want to know is where you found my book