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问题 how引导的从句作主语还是作状语

It's so beautiful how the water reflects the sky.这个主语从句为什么用how引导呢？此句how做状语吗？如何理解？

问题 upon one another 的用法

upon one another  是短语吗？ 在句子中充当什么成分 ，比如在 the  interplay  of  the  varied national groups upon one another ，upon  这个可以在句子中做定语吗？

问题 方式状语从句的用法

They did the experiment as their chemistry teacher had instructed.这句话中的as引导方式状语从句，结尾能不能加them或to do，感觉这句话不完整，方式状语从句应该怎么用？Do it the way you were told. 这句话中结尾能不能加to do it？

问题 “逗号+with”的句子问题

...师关于“逗号+with”的句子问题。Despite this characteristic, the most common drawback for any PD controller, with unknown dynamics or even with unmodeled dynamics is the error signal differentiation. 句中为什么用逗号和with将主语和谓语隔开？这是什么语法结构...

问题 关于含 if 的省略

My thought at the time was that the sample had been corrupted, but if so not by my presence.but 作为连词，其后面所连接的句子是不是省略了谓语？but if so, that was not by my presence. 这样还原对不对？

问题 这是主语补语吗？

1)Whether eaten raw or cooked, fennel is good for you.2)He sat there on the sofa, with a map spread on his knees, with his face under the lamp bright and alert.上面2句：其中1)raw or cooked是否是fennel的主语补语，2)bright and alert是否也是He的主语补语呢？

问题 成分分析

... copy fresh off a printer may look terrific，it will read only as well as the thinking and writing that have gone into it.这句话中，worth remembering是做什么成分。该怎么认识这种语法现象呢？it will read only as well as the thinking and writing that have gone into it.如何...

问题 across和through表遍及的区别

2000 workers across/through the agency are to be fired.   An atmosphere of anticipation vibrated through/across the crowd.请问through和across在表示“遍及”时的区别？谢谢

问题 While是否可以引导定语从句

根据新牛津英汉双解大词典的While词条，While可作为关系副词引导定语从句，并给出了例句：the period while the animal remains alive可是查阅几本语法书都么有找到While的这个用法，老师们对while引导定语从句是如何看的。谢谢！

问题 人称代词作表语主格or宾格？

Who is knocking at the door? It's I/me.If I were she/her, I would take the advice.请问刘老师，这两个句子都对吗？人称代词作表语，正式情况多用主格，口语多用宾格？

问题 would rather反义疑问句

I would rather he finished the project soon, didn't he?I would rather he finished the project soon, wouldn’t I?请问老师这两个句子都是正确的么，分别应该怎么翻译呢？

问题 前面有逗号的 that 从句

I was forced to exercise care in threading the mazes of the wooded hollow, that I might throw off a possible pursuer. 请问老师，这里逗号后面的 that 引导的是什么从句？它是不是 so that 省略了 so？

问题 主句的主系表是哪几个

Given the widespread hostility to “public” women in the eighteenth century, was female political activity quite so unproblematic as these new studies tend to assume?

问题 from…forward

From that day forward the Assembly was at odds with us .Velzquez's work from that time forward was confned largely to portraits of the royal family .请问这个from…forward表示从…之后，和直接用from…有什么区别？因为from本身就有从…之后的意思，所以不太明白为...

问题 is customary for的意思

Many of the animals were in prime condition and had more body fat than is customary for animals arriving from the wild.请问is customary for在此处是什么用法？感觉可以直接去掉？