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问题 trickle down后面为什么加to

以trick down 向下流淌为例：To make the gains of innovation better trickle down (to) peopletrickle是vi.，所以后面加介词跟宾语，但是为什么还要加个介词to呢？有什么差别吗？同理，像 stream down (to)

问题 what与as 用法的区别（A is to B what C is to D）

Railway is to a country____ blood vessel is to a man's body.A. what       B. as         C. that       D. like这道题中，what是起到什么作用呢？为什么不能选B？望各位老师解答，十分感谢！

问题 to的用法

To the night-bound sea a storm has come!请问老师to在这里理解为朝着，还是在...方位？

问题 help to do sth 的句子成分

老师说help to do sth是固定搭配, help to do 是谓语，我怎么觉得help是谓语，不定式to do sth 作宾语啊。比如：He helped me to do the work.

问题 as opposed to是做什么状语以及两个带to成分相连的成分

...rovide heat for the whole house through flues, uh, small air passageways into each room, as opposed to having a fireplace in every room, which would require more cleaning and make the air inside the house dirtier.请问：small air passageways into each room算是flues的同位语还是非限制...

问题 sth/sb plan sth/sb to do/be... 这种句式是否正确

...到这个句子的被动语态用法，比如：The 2010 winter is planned to be announced during the month of April.Business areas that consistent with the new strategy are planned to be divested or managed for value.This objective was planned to be met by implementing 4 main activities with 5 subs...

问题 bring back to的用法

This picture often brings back to me many happy memories of your high school days.back是副词，bring back to的用法是否同：bring sb sth或者bring sth to sb？如果用法相同，那么bring back后面应该是间接宾语？或者将间接宾语放在介词to后面？即为：Thi...

问题 to do sth 与 that do sth

This is a new train to enable easier access to the stadium.This is a new train that enables easier access to the stadium.English is a language to make you feel difficult.English is a language that makes you feel difficult.请问这两句话中，to的用法是什么？谢谢

问题 used to的用法疑问

Haipiao is a word used to describe young people moving to Shanghai for better lives.这是定语从句吗？那used to怎么解释?过去常常?但used虽然是过去式，也是动词呀？

问题 to books该怎么理解

It is to books that I owe everything that is good in me.I owe everything that is good in me to books.怎么理解to books的意思？

问题 of up to的疑问

They travel at speeds of up to 30 knots. 这句话up to修饰30，请教老师可不可以去掉of，用up to介词短语修饰speeds？

问题 if条件句中的be to do 用法

But if robots are to reach the next stage of laborsaving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves - goals that pose a real challenge.1) for themselves 是否可以改成by themselves ? 为什么？2）if robots are to ...

问题 enough是修饰前面谓语like 还是 修饰后面的to invite...不定式

I'm sure you'll like her enough to invite her to your party.这里不定式to invite her to your party 是表示结果吗？ enough是修饰前面谓语like 还是修饰后面的to invite...不定式呢？麻烦老师分析一下这里的enough和后面的to invite...不定式，谢谢！

问题 Be subject to这种搭配对吗

老师,subject to sth/sb是形容词短语吧,有be subject to do sth这种结构吗;be subjected to do在词典也没有啊,老师,有时动词+ed结尾的形容也有be+v-ed +介词/be+v-ed+to do,这种形式吗?

问题 介词to怎么用

最近被to搞得晕头转向，to的用法谁能帮忙做个归纳总结！