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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 关于比较分句的省略问题

①She is as beautiful as youyou后面的are要不要加上呢，连词前后相同成分省略，但是you 和she的be动词的人称不一致，是不是需要加上you后面的are？即She is as beautiful as you are.②I can carry as many books as you can这句话中you后面的can可以去掉吗...

问题 the amount of后可接复数名词吗

amount of 后面通常是接不可数名词的。有的书上说，amount of 后面只能接不可数名词，不能接可数名词；而有的书上则说，amount of 后面通常接不可数名词，很少（或偶尔）接可数名词。我想请教一下各位专家老师：如何理解这个“...

问题 The bookcase is wider than it is tall.分析比较分句的成分？

The bookcase is wider than it is tall.主句比较项是wider, 那么该比较对应项在比较分句than分句中必须省略，但是我的困惑是：than it is tall 似乎不缺成分呀？如何理解than it is tall不缺成分，以及如何理解主句比较项wider在than分句中必须省...

问题 a book or two和one or two&

a book or two 和 one or two books 之类的结构作主语谓语动词用什么？比如： A book or two _______ given to her as her birthday present. One or two books _______ given to her as her birthday present. 填 was 还是 were？谢谢！

问题 with独立主格结构充当状语还是定语

Another interesting thing about kabuki is the exchange between the performers and the audience. Whereas most live theater around the world has a strong division between the two—with spectators quietly observing performances—kabuki involves a great deal of interaction.请问老师：with spectato...

问题 puff off用法

Immediately ensue the puffing off of chimney smoke in the air, the blending of laughter with neigh, and the wailing out of siren. 请问老师加粗部分如何理解？

问题 已经有of course,but可以去掉吗？

People who rent out rooms should pay tax,of course,but they should not be regulated like a Ritz-Carlton hotel.房屋出租者当然应该纳税，但是不能像监管丽思卡尔顿酒店一样来监管他们。

问题 a collection of 100 该怎么翻译

I have many stamps. So far I have even got a collection of 100.请问这句话里的of 100做同位语成分，同时省略 100后stamps吗？怎么翻译？如果就是a collection of stamps可以翻译成大量的邮票吗？还是翻译成一堆邮票的收藏品？

问题 句首强调和句尾重心

He walked into the room.依据句尾重心原则，上面的句子重点应该是into the room，可是我感觉有点奇怪。简单的状语不如主谓重要，我感觉句子的主谓结构即he walked应该是重要的.还有，我看到语法书说了，为了强调into the room可以放在句...

问题 冠词用法问题：the function of university大学前面为什么不加冠词

句子来自雅思题目，不会错的，想问下为什么。

问题 different from的比较对象是否一致（商榷2019全国卷）

The air was so different from the city.这是2019高考英语全国卷Ⅱ听力中的一个句子。我觉得这个句子是错的，因为 different from 连接的比较对象不一致。应该改为：The air was so different from that (=the air) in the city.

问题 为什么有的动词短语后用动名词，有的动词短语后用动词不定式?

What do you learn about riding a bike ? How many ways can you think of to go to school ? 第一句动词短语learn about 后为什么用动名词? 第二句动词短语think of 后为什么用动词不定式?

问题 这里的where we can...究竟应该理解成地点状语从句，还是定语从句呢？

We have a responsibility to find bipartisanship where we can to find our common ground.这是美国众议院议长佩洛西说的原话。请教老师：这里的where we can应该是省略了find bipartisanship 吧？ 这里的where we can...究竟应该理解成地点状语从句，还是定语从...

问题 percent前冠词的存在

...构特指这一概念，但是诸如例句Thirty percent [=³/₁₀] of the class failed the test. 和 Water covers more than 70 percent of the Earth's surface.  of the class和of the Earth's surface都是特指概念，但是无论是Thirty percent还是70 percent都没有被the修饰，更别提...