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问题 while doing用法疑问

while引导的从句为什么+doing 也有不+doing 的情况？到底什么时候+doing？什么时候不+doing？while引导的从句为什么有+doing也有不+doing的情况？到底什么时候+doing？什么时候不+doing？

问题 人教版高中英语课本句子诊断（2）

Pausanias, who was a Greek writer about 2,000 years ago, has come on a magical journey on March 18th, 2007 to find out about the present-day Olympic Games.【问题】这是新课标人教版高中英语必修2的句子。这句话使用现在完成时，是否正确？

问题 any在肯定句中的疑惑

老师，您好！Only if the red light comes on is there any danger to employees.只有红灯亮时，职工才会有危险。以上是词典例句。在以上的肯定句中，为什么用any，any该如何分析，在牛津等词典上没找到该类似用法，这里属于何种用法呢？应...

问题 作标题的-ing动词是动名词还是现在分词

preparing cities for robot carscoming back to me如果是单独的这样一句话，比如作标题，那这里的preparing和coming都是动名词还是分词？如何鉴别区分？

问题 不及物动词后面的不定时作何成分

及物动词后面接不定式是做宾语，而有的不及物动词也加不定式，书上只介绍了不定式作宾补的形式，请问不及物动词后面的不定时是作不及物动词的动词补足语吗？ 如happen to do yearn to do

问题 next day 和 the next day 含义

I am a Grade 9 student. I have a problem, and I do not know how to deal with it. I have a lot of homework every day, and I have no chice but to do it. I often have to stay up late. Then I sometimes find it hard to stay awake the next day. 这是初中九年级上册的课文。请教老师：这里...

问题 include 的用法一例

include在此句中表示什么意思，表示"包括"？请老师给予讲解:As you can see, there are many ways to include marketing activities in your busy life. So instead of wishing you had more time for marketing, why not make marketing a part of the time you are already spending?

问题 对话中的时态运用问题

--Where have you been?--I have been to the USA.--How long have you been there?/ How long did you stay there?--For about 3 years.粗体部分的问句用一般过去时对吗？我认为可以，甚至我认为用一般过去时更合适。请专家老师就此给予详尽的解析，十分感谢您...

问题 反射不定式可用作哪些句子成分

...句子中的不定式叫反射不定式： I have a lot of homework to do. 句中的 to do 为反射不定式，它在句中用作定语。老师说，反射不定式主要用作定语，请问除了这个“主要”用法外，反射不定式还有哪些“非主要”用法呢...

问题 现代语法角度下的短语与分句的概念辨析

...就不是词组而是分句了（限定或非限定分句）。例如：I want to take a shower. 其中to take a shower为非限定动词词组to take+名词词组a shower构成的非限定分句，不再是词组或短语。’）后，我就觉得如果动词带宾语就成了一个分句，那么...

问题 这里可以填did一般过去时吧

Did you watch the news just now？No, I did not. I ____ (do) my homework.答案横线上是用过去进行时，我想问的是刚刚就一定是过去进行时嘛，不可以填did过去时嘛，毕竟just now就可以修饰过去时啊，所以刚刚也可以表示一般过去时吧？

问题 in that 还是 in which

It put us in a special place with customers in that they could come to the site and get honest and comprehensive请问老师，如何理解 in that ? that后面从句不缺成分，这里是把当成in which一样吗？还是 in只是副词，that后是主语，代指it？ 

问题 no matter的用法

...no matter词性是什么？用法是什么？2) What if later in life they come to know a metaphorical door, like an opportunity of some sort...这里的of some sort 后置作定语的用法，和 some sorts of opportunity的表达有什么区别？哪个更好？

问题 英语难句分析（涉及三个分句的并列以及instead of的用法）

you end up spending your time lamenting what you failed to accomplish instead of moving forward, excited about what you've achieved.这句话 spending,moving,excited 三个分句并列对吗？请老师回复下，再解释下 instead of。Thank you!

问题 give up doing / put off doing 分析

give up doing / put off doing这里的doing 是否可作为动名词做宾语，如果是宾语，我们知道宾语可以置于副词前，为何无法变成give doing up, put doing off, .恳请各位专家指导解惑