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问题 risk用法(risk of doing, risk to do, risk that...)

risk作名词时，常接of doing, to do 和从句，请问这三者是作定语还是同位语？谢谢!

问题 when I do和when I am doing的区别

When I do homework，I like listening to musicWhen I am doing homework，I like listening to music 这两种说法都对吗，都表示经常的动作?

问题 关于be to do的问题

学生今天在中国日报上看到be to do的完成式has been to do，其完成式应该是be to have done啊，百度了一下也没有找到has been to do这种用法.  别个那么大的媒体总不至于出现这种错误吧，所以我就尝试着翻译了一下.原句如下：Over the ...

问题 分析What do we have to do in the evening?的句子成分

请问：在 What do we have to do in the evening? 中，不定式 to do 是什么成分？

问题 find sb do sth 与 find sb doing sth 的语法疑问

We found him waiting for us there.请问这里的 waiting 是作宾语补足语吗？或现在分词作定语？ 或两者都是？find 是否感知动词？ find sb do / find sb doing？ 如果是，在什么情况下用do?谢谢！

问题 like to do / like doing 辨析

...上两个例句是否都可以，是否都表示同一个意思？like to do 是指在特定情况下，like doing 是表示一种常态，但有时也能互换？以上两个例句属于哪种情况？

问题 prevent/stop sb from doing sth（from doing sth是什么成分

今天看到一个句型，prevent sb from doing sth, 同时也看到了两种理解， 第一种将from doing sth 看作状语，第二种，也有将from doing sth看作宾补的，请问老师，哪一种才是最严谨的说法呢？ 个人支持第一种。 如果省略 from, doing sth可以看...

问题 stop sb doing sth, stop sb from doing sth等动名词作什么成分

stop sb doing sthstop sb from doing sthpreven sb from doing sth如题，这类句型中doing sth在句中是什么成分呢？宾补？宾语？还是状语？如果是状语的话，那么是什么状语呢？

问题 while引导时间状语从句可以不用进行时吗？

Please turn off the tap, while brush teeth. 句子中有 while，而且是引导时间状语从句（只不过是祈使句形式），为什么没用进行时呢？ 什么情况 while 后的时间状语从句可以不用进行时呢？谢谢老师！

问题 that的省略问题

...iven that,   considering that,  now that,  seeing that, 这四个连词后的that可以省略吗？是否前两个可以，后两个不可以？比如：Given (that) you are all here, I will show you round.Considering (that)  he is a child, we let him go.Now (that) you are all here, let's try a...

问题 was responsible for doing与was responsible to do的区别

老师说表示负责做某事，应说 be responsible for doing sth，而不说 be responsible to do sth。比如： Tom was responsible for cleaning the windows. 汤姆负责擦窗户。 请问除了表示“负责做某事”外，在其他情况下可以用 be responsible to do sth 吗？

问题 继续请教to do和doing与谓语动词的时间关系

1. She spent two hours doing her homework last night.2. It took her two hours to finish her homework last night.3. She took advantage of the children's absence to tidy their rooms.请问以上三句，如何分析动词不定式和现在分词与谓语动词的时间关系？1、2句都是花费…...

问题 but to do与but do 的疑问

can't help but docan't choose but dohave no choice but to dodo nothing but docan't but do请问这些结构中,为什么单单have no choice but to do需要用到to,而且结构就不需要to呢? 如果再碰到其他结构,怎么判断要不要加to,这有什么规律可循吗? 

问题 still doing sth和still be doing

the company has a mechanical clock that is designed to still be marking time thousands of years hence.请问这里为啥是still be doing呀 谢谢老师

问题 do sth oneself与do sth by oneself 的区别

She did the work herself.She did the work by herself.请问这两个句子的意思有区别吗？总结起来就是：do sth oneself与do sth by oneself 有区别吗？