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问题 现在分词前用不用逗号的区别

They came into the classroom, surrounding their teacher.He saw a man coming towards him.老师您好：这两句话我有两处疑问。① 为什么一个加逗号，一个不加呢？② 这两句的非谓语：surrounding their teacher 以及 coming towards him  动词用ing形式到底...

问题 a course to assist中的to是副词吗

a course to assist adults to return to the labour market成人重返劳工市场的辅导班老师，a course to assist，to是副词吗,什么用法？

问题 非谓语短语动词的相关逻辑关系

I couldn't help laughing.You finish reading the book.I practise running every morning.I enjoy listening to music.老师，这样的句子对吗，如果动名词是不及物动词呢，为什么I need to sleep.不定式的逻辑就通，动词名一定要及物动词的吗？英语的逻辑思...

问题 too great a financial burden的用法

The heavy tax is too great a financial burden for us.老师，too great是作状语修饰后面的短语,在一句完整的主谓宾或主系表结构中，分枝(短语，词组，句子等)在句子里要么补充成分，要么修饰成分，是这样理解吗？

问题 because if...分析

...种什么语法现象？He had to stop talking because if he’d kept on, the stuttering would have started. 他不得不停止讲话，因为如果他继续下去，口吃就会发作。I didn’t give my name because if I did I thought you might not have come. 我没有留下我的名字...

问题 Up by与Up表示“上升”时的区别

老师好，当使用up表示提高时， Up by 30%为上升30%；   Up to 30%上升至30%， Up是否可以直接加百分数呢？如果有这个用法这里的Up 是什么词性呢？  如 the profits is up 30%.辛苦老师解答！

问题 die fighting 这个词的fighting是什么词性?

比如 They prefer to die fighting rather than ....         Died fighting on the battlefielddie是动词,fighting是名词吗?        

问题 (a medical record) Pulmonary: Breath sounds are e

Does“with good air entry and exit”means the pulmonary ventilation is good?

问题 定语从句中，关系代词that和who如何辨析？

Granted, you're not the pronunciation expert that I am. But you have been speaking English longer than I have.上句中的that I am 定语从句不可以换用who作关系代词吧？为什么呢？

问题 I wait for for an hour...这样可以吗

He is the man who / whom / that  I waited for for 3 hours. 这里不提前for， 连用两个for 自然吗？

问题 不定式做宾补还是目的状语的区分

There are social media distractions on the same machine that they are supposed to be using to do their work.请问老师to do their work是做宾补还是目的状语？有没有区别两者的好方法？

问题 whether to be hopeful... 这里是否可以省略

曾看到这样一句话：The principal’s inbox has been flooded with emails from students wondering whether to be hopeful about a new teacher. whether to be hopeful... whether后是否有省略，可不可以这样用呢？

问题 系表结构中的不定式（反射不定式）作什么成分

The book is interesting to read. 问 to read 这个不定式该如何分析其成分？

问题 过去分词和being加过去分词，意义上有什么不同

请问老师这句话，to everybody's surprise, the meeting ended, with nothing settled. 为什么不可以写成 being settled的呢？这个也表示被动，请问有什么区别吗？谢谢

问题 big day的说法符合英语习惯吗

After I had pictured it over and over again in my mind, the big day finally arrived: my first day at senior high!这是外研版新教材高中英语必修一第1单元中的句子(p2)。以前从未见过 big day 的说法，难道不应该是 great day 吗？