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问题 when doing, while doing

___________ arriving at the camp,the coach asked us to ski. I skied carefully,but....题目答案是when, 想问一下，还可以是while吗？when doing等于while doing?这里arrive 是短暂性动词，用了ing形式，表示“即将”吗？

问题 用分词或不定式有什么区别

He tried treating the patient with a new medicine.I regret not having taken the job.尝试，懊悔这类词，后面用分词和用不定式有什么区别？   （治疗病人，得到工作 不应该用不定式更合适吗？）

问题 How long既可以表示时间和距离吗?

How long does it take from A to B? 这种可以表示时间。我想知道 How long is the bridge over the Yellow River? 这种常见吗？

问题 不定式进行式作后置定语的问题

如我想表达，下个星期将坐在这个座位考试的考生是ALICE，可以翻译为：The candidate to be sitting on this seat for the exam is Alice.

问题 prevent能直接跟doing sth吗

比如The cylinders shall be secured with triangular wooden chocks to prevent rolling.这句话是不是错误的？应该改成prevent them (from) rolling.或者是把rolling改成名词prevent the roll.

问题 关系代词that前有逗号的缘故

《经济学家》的句子：But the danger is that America continues to drift towards protectionism, industrial policy and, on the left, punitive taxes on capital, that dampen its business vim. 各位大咖专家老师怎么看？谢谢！

问题 only后接句子用不用that的疑问(only / only that)

...y (that) I am too busy. He would have come yesterday, only (that) pressure of work did not allow him to come. 用了 that 意思重在那主要的从句，不用 that 意思重在那附属的从句，如：I would do it with pleasure, only that I am too busy. 假使我不太忙，我将乐于做这...

问题 请帮忙看一下下边的句子

...chool.  是主谓吗？to school做地点状语吗？2. He waited for the bus. 和1一样吗？还是wait for 看作成语动词，the bus看作宾语呢？这样就是主谓宾吧？3. He looked at me. 这个和2是一样的吗？

问题 to be seen 的意思

看《经济学人》遇到这样一个句子“The authorities are keen to be seen to be cracking down hard.”请问这个句子和“The authorities are keen to be cracking down hard.”有何区别？如果有，“to be seen”在句中作何理解？可以帮忙列举类似的用法吗？

问题 both, all 用于宾语后的问题

I kissed them both.对 I kissed them all.对 I kissed both.对 I kissed all.错 I kissed the girls both.错 I kissed the girls all.错 理解对吗？

问题 that可以引导状语从句吗

At the LEAP Institute, they teach mental-health professionals how to build enough trust with the mentally ill person that he will follow advice even if he won't admit to being sick    请问:这里的that单独出现引导的是状语从句吗？

问题 句中的过去进行时

If a similar readjustment were to happen this year, it could lead to the government saying it was now on track to meet its modest 2030 target without the carryover credits.本句中为什么saying后面要用过去进行时呢？句子不是对于未来的虚拟吗？谢谢回答

问题 close, open用主动语态和被动语态的区别

The door won’t open. The door won’t be opened 请问这两句都对吗？如果都对，它们的区别是什么？

问题 close to作宾补还是状语

打扰老师了，我想请教两个句子：He clutched his bag close to his chest . 他把包紧紧抱在胸前。这里close to…是介词短语作状语吗？The old man put his armchair close to the stove.这句的close to…是介词短语作宾补还是状语？谢谢！

问题 此处that引导的是什么从句呢

It only takes me about forty minutes to get to work that the new road is open.此处that the new road is open 引导的是什么从句，能分析一下么?