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问题 开头用while对不对

In the first drawing, a girl is working hard. While/Whereas in the second drawing, a boy is sleeping.请问老师，while，whereas表示对比时，能放在句子开头吗？在词典中没看到。

问题 as well as 成分

The baby's mother, together with two other children, has escaped from the fire.这句话中，together with two other children是状语成分还是主语成分？

问题 是否需要加to

请问老师，在一些外国网站看到了这样的句子： The security of the organization is expected to be attached great importance. 请问后面需不需要加to？ Why should those principles be attached importance? 这句需要加to吗？为什么？

问题 可数名词的用法

The traditional assumption that office life would return to norm has been challenged by the changing view of office work held by people from all walks of life. 请问老师介词后面的可数名词，像return to norm不需要加冠词的吗？这是为啥？

问题 all of your rooms与all your rooms有区别吗

A：Just a moment… Ok, so you currently have the DX405 in all of your rooms. Will you be wanting the same model?B：Yes, please.A：And installation as well?B：Yeah, sometime next month after we finish the remodeling.A：Alright, that should be fine. I’ll get you a quote and email it over.B：T...

问题 which的先行词，以及插入语中的but

This idea is not difficult to grasp when we think about the gaze of ourselves in the mirror or the gaze of other people, but it can be applied to objects, which might also be said to 'send back our sight'.当我们思考镜子里自己的凝视或其他人的凝视时，这个想法就不难...

问题 不定式和现在分词作名词的后置修饰语的区分辨析？

http://ask.yygrammar.com/q-44236.htmlTourists made up about 40 of the METS visitors but on this day the line to get in consisted mostly of New Yorkers.line 与 to get in是主谓关系。请问上句可以说成the line getting in...吗？用现在分词和不定式究竟有何区别？我搞不清...

问题 不定式为什么要理解为结果状语而不能理解为目的状语

...不是有我不知道的上下文背景:  Pearson has pieced together the work of hundreds of researchers around the world (就是这里)to produce a unique millennium technology canlendar  that gives the latest dates when we can expect hundreds of key breakthroughs and discoveries to...

问题 最后一小句，为什么逗号后直接跟谓语动词double?省略主语的话不需要加上连接词and 吗?

Even as profits slumped, investors in the s&p 500 benchmark index earned 14.3% in 2020, about double the typical return over the past 20 years. 

问题 walk用作及物动词的用法

walk本来是不及物动词，但是有个短语是walk the dog（遛狗），它变成了及物动词。请问walk用作及物动词时有哪些用法，即walk除接the dog外，还可接哪些宾语？

问题 疑问句为什么没有问号

Had we not missed the plane, we would all have been killed in the crash.这个疑问句为什么没有问号？

问题 句子的省略用法疑问

At the top Alice could see right across the country-and a very strange country it was．across 在句子中是作介词吗? it was 后面省略了什么？it was 和省略的部分在句子充当什么关系？

问题 as的疑难用法

1. The room is decorated as it was in 1990.请问这个句子中的 as, 是属于定语从句的关系词，在从句做表语吗？ 2. 以下的 as 用法对吗？ He is as handsome as he was in the past.

问题 now that的用法

The man and his wife knew that others would come soon, begging and crying to be taken in now that the time was here.now that 什么意思？是做连词用吗？

问题 关于名词性从句的成分判断

名词性从句不是从句作主语、表语、宾语成分吗？We can see the river from where we live. 主句没有缺成分吧，主句是We can see the river 吗？