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问题 主句是一般过去时before从句可用过去完成时吗

He left the station before I had hurried there. 这个句子主句的动作发生在先，为什么从句用过去完成时？ 换句话说，如何理解主句是一般过去时而before从句是过去完成时？  

问题 As much as has been achieved 用法疑问

As much as has been achieved in connection with globalization, there are much more to be done.这里的as much as看似用作即是，但他是不是缺了主语？

问题 what happened that eliminated 中的that的用法

We do not know exactly what happened that eliminated so many species in a relatively short period of time, but there are several possible explanations. 托福写作中句子，还请老师指点，谢谢！

问题 动名词和现在分词鉴别的问题

There are many "forced riders", who are suffering from the climate _______ having impacts scarcely contributed to the problem.A.though B.despite为什么答案是though，把having done看做是分词，我可不可以看成动名词，选despite是不是动名词having done的使用场景太少了...

问题 祈使句的动词原形前加do的用法疑问

语法书上说“在祈使句的动词原形前加上do是为了强调请求”，但下面这样的句子理解为强调有点奇怪，难道是请求对方再吃一些吗？这不礼貌吧！ Do have a second helping—there’s heaps more. 再吃一些吧——东西多着呢。

问题 whether从句用否定式表示肯定意义

...是这样吗？二、She  consideed whether it wouldn't  be wiser to remain silent.她认为保持沉默会更明智，肯定。三、He wondered if he hadn't better break up the  relation with her 。他知道最好还是和他断绝关系，肯定。A、第一句字面的意...

问题 关于be动词后接副词和形容词的理解困惑

...，可以理解，是系表结构，说明主语的性质，例如The food is off - 食物变质了。但是也经常见到be动词后接副词，例如I am off, 我走了。 请教老师:1)  系动词be后可以接哪些性质的副词？2）和接形容词表明主语的性质不同，be+副...

问题 “clumplike”，一个在所有词典里都查不到的单词

... of the homeless gardens of New York City the actual cultivation of plants is unfeasible, yet even so the compositions often seem to represent attempts to call forth the spirit of plant and animal life, if only symbolically, through a clumplike arrangement of materials, an introduction of color...

问题 为什么不加定冠词the, 说成in the brackets呢

Millie is writing about what her family memebers are doing. Help her complete her article with the correct tense of the verbs in brackets.这是初中英语课本上的题目要求，然后这句话的下面，就是一篇小短文，有例如10个括号（）需要填空。我的问题是：为什...

问题 名词stay, walk与动名词staying, walking如何区别

...?为什么不直接用名词形式walk?We can go to Nanchang by train. It is faster than walking.

问题 间接引语的时态问题（主句用过去时态宾语从句可以用现在时态吗）

Are you really listening? I asked how old you are.这里句子 I asked how old you are 的时态有点难处理：主句用的是一般过去时，按理说，宾语从句应该用一般过去时来呼应；但宾语从句是问对方现在的年龄，很显然，这是问“现在”的年龄，而...

问题 考查状语从句引导词的一道单选题

—I am going to Hangzhou for a holiday this weekend. —_______ you are there, can you buy me some green tea? A. Because   B. If   C. While  D. After 就该题的各备选项，请专家老师给予讲解。学生选择了C。谢谢你们。

问题 现在分词短语还是动名词短语的区分和不同用法

It was there, sitting in the lunchroom, trying to make conversation with seven curious strangers, that I first saw them.sitting和trying这两个是现在分词短语还是动名词短语，承担名词类还是动词类的句子成分？

问题 late besides me是一个整体吗（在句子里充当什么成分）

比如 There are five other students late besides me. 这一串late besides me 看作一个形容词全部做表语吗？

问题 not counting还是not to count

There are only ten apples left in the baskets, _______the spoilt ones.A .not counting B.not to countC.do not count D.having not counting为什么不选B?不定式作状语也可以表示条件啊，与现在分词有什么区别？