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问题 几个关于of的表达

... 7 days. （这里的of  7 days做后置定语，表示同位关系）the last 90 days of historical data.  近90天的历史数据  是否也是historical data 做后置定语？ 3 days of moments  朋友圈仅三天可见，这个是否也是of moments做后置定语？为...

问题 to communicating with others在这里是做什么成分

The Internet also provides us with a cheap alternative to communicating with others.这句中的to communicating with others是做什么成分？我把它理解为目的状语对吗？to coummunicating能否用不定式的形式即to coummunicate来代替呢

问题 为什么主语用to do 而不是doing

... development and eradicate hunger and poverty remains a major challenge of the world and a common responsibility of mankind。促进农业发展，消除饥饿和贫困，依然是世界面临的重大挑战，也是全人类肩负的共同责任。请问为什么是“ To promote agricultural deve...

问题 为什么 everybody后面不能用 his or her 来指代

PEU第三版有这样一句：When everybody had finished eating, the waiters took away their plates. 每个人都吃完了以后，服务员就把他们的盘子拿走了。(不能说：…his or her plate.)

问题 when and where算单数吗？

Professor James will give us a lecture on the Western culture, but when and where ____ yet.(2007 浙江) A. hasn’t been decided B. haven’t decided     C. isn’t being decided D. aren’t decided

问题 关于 feel sorry for / about 的用法疑问

老师好，The girl seemed to feel sorry for him.首先 seem 与 feel 我认为在本句中都做系动词，seem 的表语是介词短语 to feel sorry for him，而 feel 的表语是形容词 sorry，这样理解是否正确？feel sorry for sb 对某人感到遗憾feel sorry about sth 对某事...

问题 无冠词名词表示概念而非实物

...时an area of cleared ground是不存在的，在cleared ground前不能加the或者a,因为冠词意味着一个实际存在的东西。不加冠词的cleared ground是一种概念，一种在人的脑海里假设的东西。不知道我的理解对不对，请批评指教。

问题 怎么区分while引导的是时间状语从句还是条件状语从句

怎么区分 while 引导的是时间状语从句还是条件状语从句？Some people waste food while others haven’t enough.一些人糟蹋食物而另一些人却食不果腹。We must strike while the iron is hot.我们要趁热打铁。

问题 run aground 是系动词+形容词吗？

The ship ran aground where there should have been a depth of 35 ft.请教老师：上句是词典例句。aground词典都列为adv副词，词组run aground是搁浅的意思。我的疑惑是，run aground应该是系动词+adj用法，aground怎么会是副词呢？如果aground是副词，修饰...

问题 However exciting this may sound这句话是什么结构？

However exciting this may sound, Walker is quick to remind the optimistic observer we still have zero evidence that life actually exists on any of these far-off planets.

问题 连词和状语从句可以构成插入语吗

Iconoclasts, either because they were born that way or through learning, have found ways to work around the perceptual shortcuts that plague most people.                               阴影部分：是插入语吗？还是状语从句啊？              ...

问题 death toll是数字时后面该不该再用数字加people

The final death toll came to 2,743 people—almost all New Yorkers.这是《经济学人》里的句子。我认为这里有people不太规范，应该去掉。各位大咖专家老师怎么看？多谢！

问题 关于with加宾语加宾补的疑惑

...解答!Yet science has a cultural history, too, with roots going back to the dawn of civilization问题1: with加名词加V-ing，如何判断是with复合结构(with+宾语+宾补)，还是现在分词作名词的后置定语，还是动名词的复合结构呢？问题2:以此类推，with加名...

问题 Little 位于句首引起的倒装句如何变成非倒装句

比如下面这个句子：Little did he think the police would be waiting for him. 他没有想到警察会在等他。如果想要它不倒装，little 应该放在句中的什么位置？

问题 all 2600 cars already sold为什么没有用定冠词

The company ordered a recall of all 2600 cars already sold. 公司下令将已售出的2600辆汽车全部召回。请问这里为什么不用定冠词？这里的2600 cars 不是表示特指吗？