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问题 commence是及物动词还是不及物动词

I will be on leave during the week commencing 15 February.各位老师好，请教一下句中的commencing在这里是及物动词还是不及物动词？也就是说，句中的15 February是作commencing的宾语还是状语？希望老师解惑，谢谢！

问题 to have done 表将来完成的用法

I hope to have arrived at the airport by noon today. to have arrived 和 to arrive 的区别是？谢谢老师解答。

问题 关于by+时间，该运用什么时态的问题

The bad weather will set back our building program by three weeks.这句其中能否用将来完成时？在与by+时间这种时间状语搭配的情况下，一般谓语动词用什么时态？

问题 一个句子三个从句如何分析（并翻译）

Making a timeline that shows when different events happened can help you understand how the events are connected to each other.本句摘自高中英语新教材（人教版）必修二第1单元(p5)。请帮忙分析一下句子结构并翻译一下，谢谢！

问题 句中被动为什么也要省略to

The prisoners were let go let变被动不是要加上省略的to吗?为什么这个句子不加?

问题 once that…为什么是错的

Remember that you won't be able to cancel the contract once that you've signed.这个句子中的 once that 用错了吗？为什么呢？

问题 动词measure的非谓语动词用法

—Have you decided to rent the flat? —Yes.Its living room______4m by 6m suits me fine. A. measured    B. measuring C. to measure D. to be measured  

问题 两道非谓语动词难题

1. Whom would you rather _______ the work? 答案是have do。我写的是have to do。为什么啊？ 2. What’s troubling them is _______ enough experienced workers. 答案是their not having。我写的是not their having。为什么啊？谢谢！  

问题 名词性句还是定语从句

老师您好。Tired and disappointed, the resure team finally reached ______ used to be a village.这里的空填what。 答案说这是名词性从句，但我觉得空前面不缺成分，reach 不是个不及物动词吗？后面又缺成分，应该是个定语从句啊。谢谢老师的...

问题 关于when引导的定语从句的动词形式

He will never forget the day when his wife died / was dead. 请问这里用 died 或 was dead 都可以吗？用 was dead 是表状态，用在这里是否不妥？

问题 “安乐死”可翻译成mercy killing吗

看到这样一个句子：Should the law allow mercy killing? 法律应否容许安乐死？句子中将 mercy killing 翻译成“安乐死”，这样的翻译准确吗？

问题 句末不定式后的介词可以省略吗

Play the recording for students to listen.这里的 listen 竟然没有介词 to，句子对吗？请专家老师解惑。

问题 这道题为什么选择过去完成时

I felt extremely exicted as it was the first time taht I ______　abroad at all.A. have ever beenB. would have ever beenC. had ever beenD. was ever这道题为什么选择过去完成时？

问题 这句为什么不是定从？而是同位语从句？

it was a sign that the child was growing up.

问题 过去分词作宾补还是后置定语

The manager was satisfied to see many new products _____(develop) after great effort.这里我知道填 developed过去分词。答案说developed是做宾补。但是我的理解是过去分词做后置定语修饰product，所以到底是宾补还是后置定语呢？还有after great effort 是...