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问题 shall 可以用于第三人称后面吗

The students shall wear uniforms. 学生必须穿制服。请专家老师说说这个 shall 的用法。shall 不是应该用在第一人称后面吗？

问题 take sb into custody

The woman was so clearly unwell that when she was taken into custody she was incoherent. taken是物理意义上的带走，然后进入拘留的状态，还是比喻意义，把某人带入拘留的状态？

问题 because when是什么用法

Because when you know the true reason, you will run away at once. 请问这里为什么既用了because 又用了 when 呢？是不是重复了？

问题 定语从句省略现象

Every student should regularly experience the "Aha!" — when something you never understood, or something you never knew was a mystery, becomes clear.两个 something 是并列主语，第二个 something you never knew 后面是否省略了（that）was a mystery？请老师分析下结...

问题 强调句中的that从句是定语从句吗

It was the headgear that attracted most attention. that从句可以当做定语从句吗？

问题 a great many of+复数名词

After a great many loud explosions, the race began.a great many of+复数名词。这里为什么不加of?

问题 But not后的省略形式

Where A is the thermal conductivity of soil considering its moisture content but not freeze-thaw cycles请老师帮忙看看我这but not 后省略considering的做法正确吗？

问题 settled的翻译和句子成分分析

The dust settled into a solid globe.这句话是主谓，还是把settle into可以看成一个短语动词么，这样又是主谓宾了。settle这里可以翻译为什么比较好

问题 No one与Nobody的区别

英语单选题：—Who's in the room?— ______.A. No one     B. Nobody我认为A和B都正确，请指点。谢谢!

问题 怎么判断where从句是状语还是宾语

The fox is sniffing where Susie has walked.如例句这样的，sniff及物、不及物都可以，那我怎么判断后面是where从句是表示地点的状语还是宾语呢？

问题 what who 区别

Environment makes ____ we are. If we damage the environment, we’ll endanger ourselves. A. what                       B. who              请问这里是用who还是what呢？

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？