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问题 must have been 是现在完成时吗

The city at one time must have been prosperous. 这座古城曾经一度繁荣。这句话不是过去完成时吗？为什么用have been？at one time 是个固定短语吗？

问题 动词 water ski 是什么构词法

He waved desperately to his companion, who had been water skiing for the last fifteen minutes.这句话的water ski是动词？为什么会有这种动词，这不符合语法啊，无论它是双谓语还是名词+动词。

问题 due的词性和用法

...n order to get your money.Any money due you will be sent by cheque through the post.（朗文词典）due一般是形容词，这里的due是形容词吗？我感觉像介词，但是词典里确实是放在形容词词性里面列举的例句。

问题 look stuff up on用法疑问

She mostly looks stuff up on Qwant, which prides itself on not tracking users in the manner its rival does.老师好，这里的looks stuff （up on）…是什么用法？我没有查出来可以对应的意思……

问题 Consistent with reductions ...可以用作主语吗

Consistent with reductions in tooth wear in the shift to softer diets are reductions in craniofacial robusticity, both in Old World settings and in New World settings.请问该句中的主语是什么？

问题 是不是省略了代词it的判断

Do you think the budgets are ready for me to take to investors for them to see?take to investors, 这里的take后面是不是省略了代词it，但有觉得不是，想请教各位老师？

问题 see no ugliness or vice 怎么理解

Up to a certain age, the young are to see no ugliness or vice. see no ugliness or vice 怎么理解呢?

问题 翻译：工作不只是为了...（否定放前面还是后面）

请问翻译"工作不只是为了..." 这时的work否定放前面还是后面?I work not just for the money.I don't work just for money.不知work作否定时, 是否需要前移, 还是前后都可以?

问题 状语从句中的主语太长时如何解决

如果状语从句中主语太长，如何解决？比如这句话：Shanghai did not originate from where the tall buildings, luxury shopping malls and CBD are. 该怎么平衡句子？我寻思用there好像也和where的作用相冲突。

问题 ed发音有什么规律

Which "ed" is pronounced differently from the others? A You did your share better than any woman this blessed day. B They have two children aged six and nine. C He is a serious scholar, a genuinely learned man. D He lost his beloved wife last year. 老师这个ed发音有什么规...

问题 请问有修饰时间的同位语吗？

The project uses eight groundwater pumping stations built in 1954, before Senegal achieved its independence from France in 1960.这里的“before......in 1960"是时间修饰语是修饰前面的句子的，还是用来修饰1954的定语从句，又或者是来做1954的同位语？

问题 请问有修饰时间的同位语吗？

The project uses eight groundwater pumping stations built in 1954, before Senegal achieved its independence from France in 1960.这里的“before......in 1960"是时间修饰语是修饰前面的句子的，还是用来修饰1954的定语从句，又或者是来做1954的同位语？

问题 有关after引导的从句问题

老师请问：After _____ seemed an endless wait, it was his turn to enter the personal office. A it    B what   C that   D there答案把它看作是after引导的宾从，这个句子为什么不能理解为after 引导的时间状语呢？谢谢.

问题 以下形式的否定形式搞不懂：

The team had won no games and it lost heart 老师！这是从书上抄的一句话，表示一般否定句，一般在非实义动词后加not，它这里否定形式放在了实义动词之后，这句话是不是有点语法错误还是英语本来也可以这么用?如果可以这么用的话...

问题 现在完成式的表意理解

...?还是说即可能结束也可能持续下去? 如例句:He has worked in the company for 20 years.这句是表示他已经工作20年，但以后不工作了，还是工作到现在还会一直工作下去?