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问题 to do 还是 doing

...师们好，麻烦有时间时帮我看看下面几个句子:It's impolite to speak when you're eating.It was considerate of you to whisper it to me in public.It is quite necessary to react quickly to any emergency.这几句话为什么用 to speak?to reactto whisper？为什么不用ing形式？因...

问题 from…to do

I want to warmly welcome our friends who have come all the way from your part of the world to be here.问：该句中 from your part of the world to be here，其中from…to…这 to 应该是介词短语吧，可这句用成了不定式 to be here，是不是错误的？

问题 happen to do sth 与 happen to have done sth

We even put up a notice to check whether someone happened to find it, but it was in vain.这是在一篇作文范文中看到的一个句子。这个句子中的 whether someone happened to find it 是不是应该改成 whether someone happened to have found it 啊？请教各位专家老师。

问题 I am immune to sth(to sth做句子什么成分)

I am  immune to sth 请问 to sth 做句子什么成分？

问题 有对than后省略to或者不省略to的归纳或者规律吗

rather than (to) do ，这个看成复合介词，后接不定式动名词名词。这个比较熟悉了。那no other than，other than 是省略to还是不省略呢。是根据文章，大家都省略就都只用不带 to的不定式吗？有一个稍微大致的总结吗？

问题 but to的省略情况

They can not choose but (to) take up arms.前面有do, but to的to可以省略，如果前面有can或者could, but to的to是否可以省略？

问题 不定式作表语省略to

Now all we have to do is help ourselves and to pray to God.此句有语法上的错误吗？为什么help前不加to，如果照不加to的理解来看，它and后面为什么又加了to，这是什么语法知识，我才疏学浅，请老师帮助一下，谢谢。

问题 求介词to的用法总结(如to one's taste)

最近遇到了一个新搭配： to one's taste一直很好奇 to 有哪些用法，老师也是没有系统地讲过，也没有在语法网上找到，求老师总结！

问题 to be held / to have been held

The first gladiatorial games are said _________ in Rome in 264 B.C.A. to be held   B.to have been held请问这题应该是选A还是B？为什么？

问题 sth is to sth what sth is to sth分析

Books are to mankind what memory is to the individual. 书籍之于人类，犹如记忆之于个人。问题：请问what引导的是表语从句吗？to mainkind在句中是什么成分？

问题 to be able to hold his head high 这是什么意思

to be able  to hold  his head high when returning home may be the true purpose of why a soldier want to become a general.

问题 I tell the truth to you中的to you是状语吗

I tell the truth to you中的to you是当状语吗，如果是状语，那叫做什么状语，对象状语？这句话等于I tell you the truth 这是五大基本句型中的主谓+双宾所以I tell the truth to you，应该整体看作主谓+双宾结构，还是要把to you单独看成是状语...

问题 关于be used to do和be used to doing

1.The helicopter crashed to earth nearby.这里的nearby是副词，为什么不是形容词修饰earth？2.be used to doing中，为什么真正的谓语动词是be？谓语动词不是实义动词吗？used是形容词还是过去分词？3.be used to do中，This knife can be used to cut things. ...

问题 be coming to 和 be going to 都属于半助动词吗

一般来说提到半助动词都会说到： be going to，但几乎没有人说 be coming to 也是半助动词。但下面这句话参考书上说 are coming to recognize 整体做谓语：What’s more, researchers are coming to recognize that dreaming is an essential part of understanding, orga...

问题 much to your regret与come to your help的用法问题

1. It is much to my regret that I cannot join you.其中 much to your regret 是什么词性？百度词典为副词词性，但这个句子里作表语不应该更像是形容词词性吗？能不能请老师总结一下相关这类词的用法？这个to后面还能加什么？2. They will underst...