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问题 既然非谓语动词的否定用not，为什么存在 there is no turning back 这种表述？

Once you have made the first move, there is no turning back.参考相关用法：there is no后面直接加名词，比如there is no water in the bottle.there is not 后面也加名词，但是这个名词前面往往有个修饰词来修饰，比如there is not any water in the bottle.

问题 that is (to say) 和i.e. 为什么可以连接两个句子

...self to his country, that is (to say), he is a hero. I'll meet you in the city, that is, I will if the trains are running.I am a vegan, i.e., I do not eat any animal-based products.这种语法现象该怎么解释呢？that is (to say) 和i.e.是起到了类似连词的作用？前...

问题 不定冠词可以表“特指”吗

下面句子为什么为 a body 而不用 the body，这不是特指吗？Although a body has not yet been found, the police suspect that he has been murdered. 尽管并未找到尸体，警方怀疑他已经被谋杀了。

问题 无法判断这个that从句是什么从句

The system seems to be working the most efficiently that it has ever worked.请问这个句子中的 that 从句是什么从句？句子是什么意思？

问题 有时间参照的完成时用法

请问一下。Before my sister went for her interview, she researched the company on the Internet and consulted a few people.句中从句before有时间参照，为什么主句不用had researched呢？希望老师帮忙，谢谢了！

问题 let me只能接副词吗

let me alone.（副词）。 let me carefully. 这样的话就可以改成动词？ let the Mr.Wang become alone.（形容词）。 Make the world become better？ let也是动词，become也是？

问题 that还是in which

一道单选题：The government is to end the system _____ farmers make more money by leaving land unplanted than by growing rice.填 that。是同位语从句还是填 in which 成为定语从句？

问题 介词短语在句中是定语还是状语？

She looked at herself in the mirror.  in the mirror是表示地点的状语，还是作为herself的定语？

问题 句子成分分析

Nobody fitting the woman's description has been reported missing.请问report能接宾补吗？此处missing是否是主补？This is the woman I saw get abducted.No one has reported her missing yet.感觉又跟动名词的复合结构区分不开了，这里missing是动名词还是宾补？到...

问题 keep是实意动词还是系动词？

老师，请问The noise kept him awake. The teacher asked us to keep quiet.请问这两个句子中keep是实意动词还是系动词？这两个句子的结构可以帮忙分析一下吗？非常感谢！

问题 宾补还是状语的判断

请教老师们：He will have the car at his disposal for the whole month. 怎么分析好呢？ 我认为: have此处为使役动词，at his disposal为宾补，只是省略了be。而一个同学认为：at his disposal为状语 哪个比较好呢？ 先谢谢老师们帮忙！

问题 关于up的疑问

...：For more than 10 years, suicide rates among students aged 10 and up in the U.S. have been on the rise. 10多年来，美国10岁及以上学生的自杀率一直在上升。请问这里的up是什么词性？省略了什么成份？谢谢老师！

问题 deliver的理解与用法

The zones do deliver some improvements to air quality, and the science tells us that means real health benefits — fewer heart attacks, strokes and premature births, less cancer, dementia and asthma.这里的deliver什么意思? 作什么句子成分?

问题 sure和definite的用法问题

Paul Oetken, the federal district court judge who heard the case, are sure to resonate.sure和definite都有“肯定的；确定的”意思，这句话中的sure是否可以改为definite？

问题 表语从句还是同位语从句

各位老师：It appears that all the files have been deleted. 这个句子为什么是主语从句，不是表语从句呢?There is a common effect that it will affect the economic growth.这个是同位语从句吗?