问题 “参加联赛”用动词join还是take part in

The team joined the Northern League last year. 这支队参加了去年的北部联赛。 请问这里表示“参加联赛”为什么用 join，而不用 take part in 呢？

问题 be spent doing sth中的介词in能不能省略

尊敬的老师，您好！请问这道选择题的答案是哪一项，为什么？The whole morning was spent _____ doing my homework yesterday.A. in  B. 不填  C. A or B

问题 关于曹老师回答《关于in+一段时间用法》的自己的疑问

...物动词，动作具有持续期，不导致状态的改变。例如：rain, snow, shine, walk, run, write, read, sleep等。这句He had no difficulty in writing the report and handed it in in two days.里谓语动词had和handed都是及物动词，那么是否这两个词是特例？第二个问...

问题 in one's favour与to one's favour的用法区别

求解用法区别：in one's favourto one's favour

问题 分析句子：No matter how bright a talker you are...

No matter how bright a talker you are, there are times when it's better _____ silent.A. remainB. be remainingC. having remained D. to remain希望老师分析的越详细越好，知识点分析的越多越好，充分的分析整个句子。谢谢老师啦！

问题 That’s why.../ That’s because...等的区别

I had neither a raincoat nor an umbrella. _______ I got wet through. A．It’s the reason B．That’s why C．There’s why D．That’s because 答案是B。但我想知道A为什么不可以？it’s the reason省略了关系副词why不可以吗？不是可以省略why的吗？

问题 with复合结构问题

Although based in Hangzhou and with 91 percent of its sales in mainland china, it  chose to list its shares in New York.请问老师，Although based in Hangzhou and with 91 percent of its sales in mainland china中with..是介词短语，还是复合结构？

问题 my life is a battle的句子结构是主系表还是主语加不及物动词加主语补语

可以说一下主系表和主语加不及物动词加主语补语的区别吗

问题 This car is my boss' 还是 boss's.请问以s结尾的单数名词的所有格构成有何

问题 It is a shame to us. to us 在句中做什么成分，为什么可以这么用，即语法

问题 at morning 和 in the morning辨析

...ept and he smelled the smell of Africa that the land breeze brought at morning.睡梦中他闻到甲板上柏油和麻絮的味道，嗅到早晨陆风带来的非洲气息。 (海明威的老人与海）请解释一下at morning用法？为什么不是in the morning? 

问题 如何理解2个make

Three-fourths of the mistakes a man makes are made because he does not really know what he thinks he knows.主句(Three-fourths of the mistakes a man makes) are made 如何理解2个make，如何翻译呢？

问题 means的解释

Scientists may have the right to investigate anything within their means, but that does not mean that they also have the right to the means to investigate anything they choose.后半句have the right to the means to investigate中to the means是不是多余了，这里的means作何解？

问题 省略分析

than后面的句子重复成分能省略嘛？Watching a baseball match is no more intellectual than listening to music is.后面的is能省略嘛？

问题 让步状语从句与虚拟语气的两个疑问

...l, all living creatures live by feeding on something else, whether it be plant or animal, dead or alive.2) Efficient functioning depends on good design, careful attention...