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问题 over副词"重复"的用法疑问

...的adv再一次用法例句： Dave, the pianist, played it over a couple of times. 演奏钢琴的戴夫将这支曲子反复弹了两三遍。 看样子这个over似乎是adv"多余"而不是adv"重复"，老师们怎么认为？

问题 in 30 years可以去掉in吗

If you spend one hour a day reading 10 pages of a book, you can finish more than 3,600 pages a year, and 110,000 pages in 30 years.请问老师，时间状语 in 30 years 可以去掉 in 吗？

问题 were supposed to 和 should 含义辨析区分

What were supposed to be new proposals were in fact modifications of earlier ones.本句中的were supposed to 是否可以改成should ? 如可，含义有何不同？

问题 副词的位置（humanly possible还是possible humanly）

The doctors have tried____ to save the life of the wounded soldier。A everything humanly possible请问 humanly 为什么不能放在 possible 后面呢？

问题 population可以指拥有共同特征的某一群人吗

请问“不同人群”除了different groups (of people)以外还有什么表达方式？可不可以用different populations？population可以指拥有共同特征的某一群人吗？

问题 hole搭配介词in还是on

There is a big hole           the right door of the dance room. A at B  on C by D in 这道题纠结在on 和in ，请老师指点，谢谢！

问题 know sb not怎么理解

这是《现代大学英语精读1》第四单元Text A的句子:Night after night have I sung of him,though I knew him not and now I see him.虽然之前并未见到，但我夜复一夜地歌唱有情人，现在我总算见到他了。这里know sb not 是know 的词汇用法还是句法？

问题 翻译：中国使用绿色能源的努力和目标。

答案写的是china's effort and target for green energy use，我写的是china's efforts and target of using green energy，还有一种方式就是china's efforts and target in using green energy这三种表达方式都对吗？

问题 怎么理解这句话？尤其是句首的life for

Life for black people had not improved since the time of Ida B. Wells.

问题 这里的介词off表达了什么意思？

...cts made at its first commercial plant takes the carbon dioxide equivalent of 6000 cars off the road.我没有理解这里的介词off表达了什么意思？麻烦老师解释一下off用法和含义，以及句子表达了什么意思？ 非常感谢！

问题 in which的意义

...ion about their background.The most obvious way in which is for the amount of money spent on them. Expensive clothes look expensive and show their wearer had money. 该段话的第二句in which后面的is应该是谓语动词吧？那属于in which定语从句的成分去哪了？

问题 learned在句中的意思

...ast, 1782 facilities have closed across the UK in the last decade, Freedom of Information requests found.第一句话中，learned应该理解为什么意思？同时，这句话出现两个谓语动词，是否存在语法错误？

问题 过去分词与现在分词不同

He wasn't asked to take on the chairmanship of the society,___ insufficiently popular with all members.给出的答案是 being considered,原因是he 和consider是被动关系。但我知道的是现在分词表主动和进行,过去分词表被动和完成,既然是被动关系,为什么不用过...

问题 should have done 的应用

I should ___ Peter with his work, but I had a lot of things to do myself.A. help B. have helped C. helping D. be help这句话为什么要用虚拟？是因为but后面的句子用的是一般过去时？（本人英语初级者，不要介意过于深入）

问题 communication skills与communicative skills

I also plan to take advantage of every opportunity to improve my communication skills.这是高中英语新教材译林版必修1第1单元的两个句子(p5)。请问这里的communication skills可以换成communicative skills吗？为什么用名词communication作定语，而不用形容词commu...