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问题 为什么不用动名词

As many of you already know，March is Women's History Month,so it's just a few weeks until the university begins its annual observance.为什么know在of介词后面，不是用konwiing？

问题 When引导时间状语从句的时态问题

请问这句话 Their mothers were looking at the children when they played. 正确吗？play是延续性动词，为什么不能用过去进行时were playing？

问题 that可以改成whether 吗

As the financial crisis worsens, his father is worried about that he would lose his work.这里的that可以改成whether 吗？变成他的父亲担心他是否会丢掉工作，在语法上是成立的吗？谢谢老师们的指教！

问题 grass-roots 的问题

The Energiewende raises cost, unsettles supply and provokes resistance at grass-roots level.grass-roots level，这里grass-roots作定语，为什么要加s？不加是否可以？

问题 名词修饰语

各位老师:the book that Mary found matching your criteriathe book that was found matching your criteriathe book found matching your criteria这三个名词组中的matching your criteria做的成分分别是？有何不同么？我一直分不太清像这种matching your criteria是属于定从...

问题 suggest sb doing sth

The computer suggested him install an advanced piece of equipment.问：此句中是suggest sb do sth吗？suggest应该没有这个句型的，那么这是个错误的句子吧,请老师帮忙!把此句纠正正确吧？

问题 on order作什么成分

A combination of Frontier and Spirit, especially with the hundreds of new Airbus jets both firms have on order, might have increased that share significantly, making it as disruptive as its European counterparts.

问题 albeit不是连词conj吗

albeit不是连词conj嘛？连词不是需要两边同一个成分，就是两边都是短语是短语句子是句子。 //She appeared on the show, albeit briefly. //It was an amazing computer, albeit expensive. 为什么这里不是？还是我对conj理解有误？

问题 there加不及物动词的句型成分分析

请问老师：There exisit numerous elements being responsible for the issue.这句话中的being responsible是作为状语修饰exisit的吗？

问题 should have done 的理解问题

He should have left by the time you arrive.在书上看到说，should have done 表示“本来应该做但其实没有做”，但是上面这句这样理解不了吧！

问题 比较状语从句的歧义问题（as well as）

...382的as well as中如是说：    She sings as well as playing the piano.(既弹钢琴，又唱歌)    She sings as well as she plays the piano.(二者一样好)我自己想了几个句子，句子本身对不对，或是否有歧义，请专家释疑    （1）She pla...

问题 如何理解 that of sth 中的 that

请问下面句子中的 that 是什么成分？怎么理解？The second test is that of goodness.谢谢！

问题 可以说 visit an exhibition 吗

下面句子中的 visit this exhibtion 用得对吗？Visiting this exhibtion, we will not only enjoy the folk art works, but also learn a lot.

问题 虚拟条件句用动词原形be作谓语

If the news be true, this is a serious matter.老师，这句话是什么意思？

问题 lest从句的虚拟语气

The student checked his writing carefully lest it ____some spelling mistakes.A had   B has   C will have   D should have请问为什么选D，lest在什么情况下才会用虚拟语气 ？