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问题 mean business 是什么意思

The man spoke as if he meant business. 这个句子如何翻译？句子中的 mean business 是什么意思？

问题 be met by a challenge 怎么解释

The election of the new government was met by a challenge from its opponent. 感觉这个被动语态有点奇怪，请问各位老师 was met by a challenge 怎么解释？ 

问题 rather than 连接并列成分

Cheat meals should be planned into a diet rather than being a spur-of-the-moment thing. rather than连接并列成分，这里 be a spur-of-the-moment thing应该和shoule be并列，为什么会用being呢？

问题 His proposal that the meeting be delayed is quite reasonable.为什么是复杂句

His proposal that the meeting be delayed 是名词词组，that the meeting be delayed作为定从修饰proposal，这算是从属分句直接表示句子成分吗？如果是的话The students I teach have made better grades in the past few weeks.为什么是简单句？这边的I teach怎么就是...

问题 现在完成时的用法

时间状语副词before.just.in the past.recently常常和完成时态连用，请问这时的完成时态表示“已完成的影响用法”还是“未完成的持续用法”呢？我们可以 将这句话Tom has liked the girl before.和以上副词连用吗？

问题 the only后的名词

For many in China, delivery drivers like Mr zhang are the only connection to the outside world. 请问老师为什么connection是单数呀？不能用connections嘛，谢谢老师。

问题 请教下learn about 的意思

I like the class very much we learn about different plants and animals.   请教下  learn about  表示学习时 和 learn的区别呢 ？

问题 Shouldn't she be mopping her floor?是过去将来进行时吗

Patty Loski invited us over for dinner Friday night.Shouldn't she be mopping her floor?按上句好像不是过去将来进行时？但是按句意不能是她拖地。好像怪怪的。

问题 all being coverd...是什么用法，是独立主格吗？请详解

... and schools tha figured prominently in the history of Chinese thought,all being covered by the famous term"the Hundred Schools of Thought".翻译：早在2000多年前，就产生了儒家学说和道家学说，以及其他很多在中国思想史上有地位的学说流派，这就是...

问题 many living organisms can only be seen using a microscope句子成分分析

can only be seen using这个地方不是很理解，麻烦详细解释一下为什么这样写。万分感谢！

问题 半助动词 be to, get to是否有否定用法

如题，请问半助动词be to; get to 是否有否定用法。如：I am not to go school. I get not to go to New York. 这两个句子是否正确？半助动词的否定句如上述这两个否的是后面的不定式还是助动词本身？另外，现在完成进行时中的been是否是助...

问题 “介词短语=副词”的例子

看到这样一组句子：拿那只玻璃杯要小心。正：Carry that glass with care.正：Carry that glass carefully.好像这样用的介词短语 with care 与副词 carefully 变成同义词了，是吗？请问英语这样的例子多吗？还有哪些呢？谢谢老师！

问题 分句否定和部分否定的问题

With no coaching he will pass the exam.With no coaching will he pass the exam.请问老师，这两句话的意思一样吗？其中含有什么语法点吗？谢谢老师回答。

问题 英语句子成分分析（be going to do sth）

I am going to buy her a gift. 我打算给她买个礼物。

问题 句子翻译：Pull up a chair, Nancy. I'll be mother today.

Pull up a chair, Nancy. I'll be mother today.  请问如何翻译，谢谢！