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问题 it的指代问题

It will be helpful if you can take an active part in your class.请教老师这里的it 是形式主语，if 从句是真正的主语？还是说it 是个虚指？(求曹老师答）

问题 请教对一句话的理解

对上面这句话，我想是否单词oscar前面应加上介词in the，来修饰actress？还有nod for the latter表达什么含义？

问题 副词here和there可以受定语的修饰吗

...它们在句子中可以用作状语。如：He came here on official business. 他来这里办公事。Make sure you get here before midnight. 你要确保在午夜前到达这里。It is extremely cold there. 那里极冷。There were dozens of people there. 那里有许多人。He wanted nothing ...

问题 句中的somewhere是何意

But somewhere in my wicked miserable past, there have been a moment of truth.但是，在那调皮痛苦的昔日，一定有片刻的诚实。句中的 somewhere 是何意？

问题 不定式的用法

It was a bad season ______.A. to have outingsB. which to have outingsC. in which to have outingsD. for us to have outings选哪个？问什么？

问题 taste 和try

The food in that restaurant is quite delicious. Let's ___ it. A try   B taste   这里选择A符合语境，B为什么不合适呢？

问题 wherever的用法

Wherever in their incredible migrations destiny had moved these people, they had vigorously demanded deep social changes.这里wherever是作为副词还是连词？还有migrations后边好像是个省略了引导词的定语从句，请问老师这句话得怎么分析？

问题 with引导的状语

Americans often take a “business-first” approach, with personal relationships playing a smaller role than in many other cultures.此句中的with，是否可视为非限制性评注型状语？

问题 星期前不加介词

请问一下，The 2019 World Artificial Intelligence Conference was held Thursday in Shanghai  这个句子中为什么Thursday前不加on，而被省略。   谢谢老师回答了。

问题 关于被动句的问题

His father was sentenced to 10 years 加了be 而 Yunnan gang leader sentenced to 25 years in prison 没有加be这是为什么呢？求解答。谢谢！

问题 关于单宾语的被动句

The walls were ruined in wars.I was beaten by him.这两句的介词短语分别做地点状语和动作状语吗。都没有宾语。单宾语被动句本身没有宾语。

问题 Much的用法

请问老师much+复数名词的用法有要求吗？Essential Grammar in Use 中有个句子是 Do you know much about computers? 请问回答I don't know much about/many about…都可以吗，感谢老师的讲解！

问题 红色部分是什么成分？

The picnic was lovely. They had it on the top of a hill， in a sloping field that looked down into a sunny valley.请问红色部分是什么成分？

问题 语法分析

The water was freezing cold , butin jumped the young man without a second thought.（水冰冷冰冷,可那个年轻人想也没想就跳了进去.）问：but连接的并列句the young man jumped in without a second thought .此处为什么成了画线部分这样的语序？

问题 with介词的用法

 To avoid a decrease in efficiency with perovskite NCs。句子的意思是为了避免perovskite NCs效率的降低。with 介词的用法一直不是很清楚，比如这里的with,要是我 我会用of替换with。