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问题 doing做状语时和前面的主句用不用逗号隔开

doing做状语时，和前面的主句用不用逗号隔开？或者有没有逗号，是不是不一样的含义？She came running towards me.The children ran out of the room, laughing and talking merrily.一个有逗号，一个没逗号，意义有区别吗？谢谢!

问题 cannot help but open up 的结构与意思

I also know that if I perform this job with excellence, other opportunities cannot help but open up for me right here.如何理解cannot help but open up这组动词词组的语法结构，还有他的意思？

问题 as在从句中的作用和成分

求刘老师一定要给我解答这个问题，感谢！I like the same book as you do. I shall do it in the same way as you do.这两句分别是什么从句？as分别在从句中做什么成分？

问题 主将从现 VS 主将从完

1. The moment he has arrived, I will let you know.2. The momnet he arrives, I will let you know.通常遇到第2句的情况比较多，请问老师第1句这样的用法和第二句有什么意思上的区别吗？“他一来我就告诉你。”第1句是强调他一到就告诉你？

问题 whenever可引导名词性从句吗？

...at），也可以引导名词性从句（相当于anything that等）。而whenever用于引导让步状语从句（相当于no matter when）是没问题的，但它也可以引导名词性从句吗？有这样的例证吗？谢谢老师！

问题 如何对three days ago提问

比如下面一句，如何对其中的three days ago提问呢？The manager arrived here three days ago.下面两个答案哪个对？When did the manager arrive?How long ago did the manager arrive?

问题 class和lesson的区别

...否可以相互换过来？Our English teacher was preparing the lessons when I came into the office.Our English teacher was preparing for classes every day.麻烦专家老师分析一下，谢谢！

问题 定语从句转换为宾语子句

...定语从句转变为宾语子句：(2) Every year the superstar set aside when he can travel incognito with his wife.语法书说 句子(2)是错误的，为什么，请详细解释一下，（句子出处：进阶文法-旋元佑）

问题 非限制性定语从句的修饰范围

He arrived in the afternoon, when nobody was homewhen修饰的是in the afternoon还是the afternoon，我觉得应该是前者

问题 关于从句的疑惑

...词是wher(ever) what(ever) who(ever) whose(ever) whom(ever) which(ever) when(ever) why(ever) how(ever)所有这些都可以吗？3 引导定语从句，名词性从句，状语从句的关系(还是叫什么)限定词分别都有哪些？

问题 on的词性疑问

...in it for the thumb to go through, used by an artist for mixing colours on when painting这里加粗的on是作什么词性理解呢，是直接作为副词，还是作为介词的同时拿a thin board作它的逻辑宾语？像这种语法现象的正式名称是什么？感谢！

问题 帮看下这句子吧？

 At specific issue is a confrontation from January 13 when Bush and her staff encountered Greene without a mask and talking into her phone in the tunnel between the Cannon Office Building and the Capitol.这句话中的taⅠk是不是应改成taⅠked？

问题 关于句中used的疑问

When a student attacks a professor on the  social media，the language used actually says more about the students.1. 这里为什么要放used在句中?这里的used是什么意思？2. 如果used是形容词，为什么它后面可以跟着一个副词一起修饰动词say呢?

问题 关于for why的请教

There are two main hypotheses for why we get so tired from work when we're not physically active.  各位老师好，以上内容来自2019下半年翻译资格考试二级笔译综合题，请问for后面的内容都是hypotheses 的后置定语吗？for why是什么语法？ 

问题 关于介词+名词/代词+doing 结构的问题

...个句子，还想请问一下老师对不对。She didn't approve of me protecing the boy from being bullied. Jack would have been a prominet member of the Law Society but for his mother falling ill. 请问一下老师，这是什么结构呢，这里的doing的句法功能是什...