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问题 物质名词的可数性规律

物质名词通常是不可数的，但它表示有些物质名词表示一种物质时，它则是可数的。如：I need a pound of tea. 我需要一磅茶叶。It was a special tea. 这是一种特别的茶。请问：类似以上特点，物质名词的可数性还有哪些规律？

问题 一句英汉翻译中的“规定”二字不好理解

An enemy plane was shot down after it violated the exclusion zone.一架敌机在违反禁区规定被击落。

问题 will go swimming的疑问

we will go swimming if it doesn't rain.我觉得不是正确的呀，不是一个“will + do”吗？为什么是 swimming 呢？我实在疑惑，您能不能帮我解决一下？谢谢老师了。

问题 would to do 的用法

The automatic nervous system responds as it would to anger or fear by decreasing the flow of oxygen through the body.这里的would to do是什么用法？

问题 let的用法

... people are reluctant to let younger people into government then it could affect the ability of future leaders.再就是，then这样用可以么？then是副词，放在一个句子里，不是前后需要加逗号么？谢谢老师。

问题 did sightseeing是什么用法

Kristin Diehl conducted a series of experiments on photo-taking to find out whether people enjoyed it when they did sightseeing.过去式did后面为什么用ing形式（有did doing句型吗）？

问题 Take在比较中的用法

原句：Mars takes longer to revolve on its axis than the earth.翻译：火星自转一周的时间比地球长。按理来说句子主语应该是'火星'，而不是‘时间’.我先请问大家这是什么用法？

问题 怎么分辨直接宾语和间接宾语?

I find it a waste of time spending so much money on this case.a waste of time 和 spending so much money on this case 怎么知道哪个是直接宾语,哪个是间接宾语? 

问题 without the ring 语法成分

 I'm gonna have to return the ring, without the ring, which makes it so much harder这是老友记里的一句台词想请教下语法成分，感谢

问题 比较状语从句中省略的状语怎么补充

America has defended other allies, such as South Korea, for far longer than it has protected the Afghan government. for...?谢谢各位老师！

问题 even if 引导让步状语从句

Even if it rains tomorrow, we won't change our plans. 为什么是we won't, 而不是we wouldn't?这不是虚拟语气吗？even if 引导让步状语从句?

问题 what句首引导的是什么从句

What this park lacks in size, it delivers in enormous aquatic entertainment. 请问这句话what引导什么从句?

问题 句子结构

...ne food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.这句话前面是根据上文省略了动词并且倒装了吗，后面when这里为什么有逗号隔开，when后面接哪里，这句话的各部分和正常语序应该...

问题 指人的复合不定代词可以受后置定语的修饰吗

...的复合不定代词可以受后置定语的修饰，如： There must be something wrong. 一定有什么毛病了。 I’d like something cheaper. 我想买点较为便宜的东西。 Has anything special happened? 发生什么特别的事情了吗? 但是指人的复合不定代词...

问题 请分析at which引导的非限制性定语从句

 I have just found a job, ______ what I learnt at school can be put to good use.答案为 at which。请问为什么？谢谢老师解答！