问题 名词为什么不用复数形式

句子里的名词为什么不是复数形式Non-REM sleep is when our brain and body slow down

问题 [VN (that)]句式与it is believed that...例句

...式搭配的，我的理解是：[VN (that)] 表示“动词+宾语+(that)从句”，但这个例句感觉像 it 是形式主语，而 that 从句像主语从句。请教英语答疑网的各位大师，先谢谢了！

问题 must be与must have been的区别

She must have been fifty or so when I first met her at a conference.请问这句话中谓语为什么是 must have been,而不能是 must be?

问题 请分析这个句子的结构，包括句中what的用法

Therefore, when a person from one of these cultures is speaking and suddenly stops, what maybe implied is that the person wants the listener to consider what has been said before continuing.请分析这个句子的结构，包括句中what的用法。谢谢！

问题 Would you please...?与Please would you...?比较

Would you please...? 是比较常用的句式。如：Would you please pass the salt? 请把盐递过来好吗？Would you please put your name down? 请把名字写下来。Would you please look over my essay? 请你烦神把我的文章看一遍。Would you please lend me your pen? 借用一下你...

问题 曹老师解答的《有关虚拟语气中should would等词的词性问题》自己三个问题

...assing...我认为是对现在的的虚拟，不是陈述句。疑问3: if 从句中有should have 是否正确?虚拟条件句if从句是有should但是表示对对未来的虚拟表示万一、一旦。可是无论真实条件句还是虚拟条件句我没见过if从句中有should have 如果有...

问题 agree with sb that...是什么从句

I hope you will agree with me that our teacher’s advice is perfect. 宾语me已经有了，那它该是什么从句啊？

问题 贝多芬...时态？

Beethoven____(be) a great musician.就这一句话，请问be动词用was还是is合适？有什么区别吗？盼望专家老师解惑。

问题 关于虚拟语气

请问老师在这句话中If it was up to me, I'd choose...，不是应该用虚拟语气吗？也就是If it were up to me，谢谢老师!

问题 句子分析

...aid, "to the letters your mother used to write about you. I was told every time you got a sum right. I always thought of you as nine feet high, better looking than Robert Taylor and more versatile than Churchill.I was told every time you got a sum right.这里的sum和right表示什么意思，如...

问题 unworried作为形容词，那么后面的by怎么理解

The Fed is rightly unworried by cosmetically higher inflation that reflects what happened a year ago. by引导施动者还是作“原因”解释？谢谢各位老师！

问题 介词as 还是for

At that time， many farmers could only afford bread and butter as  their meal.这是某资料上的一句话，我觉得as应该改为for更为妥当，只是没找到相似例证。盼望专家老师指导，谢谢。

问题 doing 还是to do

1.it is a waste of time/pleasure/fun/use/good doing2. there is no point /sense/harm/use/good doing sth以上两个结构中doing可以改为to do 么？有there is no hurry/need doing 的结构么，看到语法书里有这样的总结，有点乱。谢谢！

问题 How well从句

How well the predictions will be validated by later performance...没写完，主要就是前面这句话如何翻译。

问题 名词性从句与主句子区别