问题 This is after...用法疑问

This was after the eu granted the government a short extension to the date on which Britain will leave, which could be April 12th if the withdrawl agreement struck between May and the eu does not pass Parliament.老师好，this is..是表语从句吗？我怎么觉得after缺主句呢？

问题 Out在句首为何不用倒装

语法书上都说当 away, in, out, off 等副词放在句首时，其后句子要用倒装，但是下面这个句子却没有用，为什么呢？Out in the garden an owl hooted suddenly.这个句子对吗？这个句子可以改成倒装吗？怎么改呢？谢谢！

问题 identify 主动形态和被动形态问题

So long as there's something to identify,we will give people their money back.请问,为什么例句中identify用主动形态,而不是被动形态? give people their money back 还能像双宾语那样前后调换位置吗?

问题 after having two periods of a challenge为什么用不定冠词

after having two periods of a challenge这句话为什么是不定冠词a，为什么不可以用the或者零冠词？

问题 beer用作可数名词时是指“一种”还是“一杯”

beer 通常是不可数的。如：Beer is at its best when it is cool. 冷啤酒味道最好。His doctor ordered him to abstain from beer and wine. 他的医生嘱他戒酒。He emptied the bottle of water and filled it with beer. 他把瓶内的水倒空，然后装满了啤酒。但有时也用...

问题 介词后面为什么加宾语？宾语为什么用名词充当

介词和动词后面为什么加宾语，宾语又为什么由名词充当呢？

问题 seat, seating, seated 的相关疑惑

...seat是及物动词，后面一定要跟宾语，所以一定要用被动的形式，那换句话说是不是不及物动词一定要用现在分词呢？ 其中的逻辑还是有点不清楚。 另外，这个D选项，seated themselves 为什么不能选呢？

问题 plan to do和plan to have done的区别

请教老师，这里为什么要用完成时呢？是不是用plan to do的话后面的时间就要改成before today呢？

问题 National Games 做主语谓语动词用单数还是复数

The 11th National Games of the People's Republic of China ______ held in various cities in Shandong from October 16 to October 28, 2009. A. was   B. were 请问答案是was还是were？换句话说：National Games 做主语谓语动词用单数还是复数？

问题 in that 还是 in which

It put us in a special place with customers in that they could come to the site and get honest and comprehensive请问老师，如何理解 in that ? that后面从句不缺成分，这里是把当成in which一样吗？还是 in只是副词，that后是主语，代指it？ 

问题 trap between floors 为什么用between 而不是among

问题 主谓一致选择题

为什么直接选B而不是A，My Antonia不是第三人称单数吗，后面用is:Willa Cather considered her novel of life in nineteenth century Nebraska, My Antonia ______.A was her best work      B her best work C her best work it was D being her best work 

问题 even, while even 相关疑问

While even the modestly educated sought an elevated tone when they put pen to paper before the 1960s, even the most well regarded writing since then has sought to capture spoken English on the page. 此处的while even与even该如何理解翻译？while even是不是是个词组呢？

问题 either…or, neither…nor连接句子

...资料上查到 not only…but also 可以连接句子（但not only后面的句子要用部分倒装）：Not only did he promise to do it, but he did it.他不但答应做，而且做了。Not only doe she speak English but also French. 他不仅说英语，而且还说法语。Not only did h...

问题 You left London as fast as you could...为什么用could

You left London as fast as you could...后面 You could..为什么用could,差实义动词？