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问题 表特指的名词前可以不用定冠词吗

请问countries不用加the,这里不是特指那些粮食高产国家吗？It will be difficult for China to reach the level of countries with high grain production in a short period of time, but the gap can certainly be narrowed through earnest efforts.

问题 上海交大2010年考博英语第4篇阅读理解

...past were exceptionally versatile men. Right up until comparatively recent times, it was possible  for an intelligent person to acquaint himself with almost every branch of knowledge. Thus  men of genius like Leonardo Da Vinci or Sir Philip Sidney  engaged in many careers at once as a...

问题 有关whether to从句在句中的成分疑问

The panel has not yet reached agreement on a crucial question,however, whether to recommend legislation that would make it a crime for private funding to be used for human cloning这里的whether to是做question的同位语吗，however是插入语吗谢谢回答！

问题 where引导的句子成分

Online, where posts can lead their own viral lives and everything leaves a trail, words can be eviscerating.online为副词，where引导的句子在句中作什么成分？和online什么关系？

问题 现在分词短语有作非限制性定语可离名词很远吗

...词短语 eating anything that they can get their paws on 是非限制性定语，这种说法对吗？这个现在分词短语是非限制性定语吗？如果真是的话，它可以离被修饰的名词 brown bears 这么远吗？

问题 sure和certain是动态形容词还是静态形容词

...o bed. 上床睡觉时一定要关灯。Be certain you catch your train on time.  务必准时赶上火车。

问题 yet用法（连词还是副词）

请问老师：这里使用as引导倒装的让步状语从句，但是我不理解Yet在句首这里的用法，麻烦分析一下Yet strange as it may seem the effort has not been wholly fruitless.

问题 句子成分

1. All human being are born ______.   A.equally   B. equal空格处做啥成分选啥词性？2. The home improvements have taken what little there is of my spare time.what从句的成分如何划分？there is起什么作用？

问题 spend time doing sth中的现在分词作什么成分

We are going to spend a lot of time building the campus to make students comfortable.这个句子中 building the campus 是做什么成分？

问题 关于not enough的疑问

not enough people这里not enough可以作定语吗？not 加形容词可以作定语吗？这种用法还没见过。 we have some, but not enough.这里but后面省略了什么？谢谢老师！

问题 what在此句中的作用

Considering (what) seems to be no reason for changing our plan, we had no way out but to stick to the old one.what引导宾语从句？在句中做什么成分？

问题 非谓语动词

...g 在这个句子中showing the present...现在分词短语这里是后置定语还是伴随状语，可不可以用to show表目的呢，为了展示本城市的污染状况，我拍了各种各样的照片，也很通顺啊。

问题 make sure 后面为什么用过去完成时

In future, I would make sure I'd checked out whoever was fitting it with their previous customers.请问 make sure 后面的从句中为什么用过去（完成）时而不用现在（完成）时？

问题 这里为什么要理解为动名词复合结构而不理解为分词做后置定语？有没有什么方法准确区别二者？

Global warming is a hot topic around the world at this time. But there is also a dissention about the evidence being presented(就是这里) to support the argument. The earth is known to go through cycles;the past has never produced an age of so much so much industrialization causing(就是这里) ...

问题 虚拟语气中若主句包括宾语从句如何安排谓语时态(续)

...于不能追问，针对上个问题“虚拟语气中若主句包括宾语从句如何安排谓语时态”中老师的回答继续请教。上个问题中老师说主语中的虚拟语气 would have done 不能用在主语的宾语从句中，但有这么一题（“英语语法网”的语法练...