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问题 定语从句

We will strengthen ongoing and ex post oversight of items for which approval has been cancelled or delegated to lower-level authorities. 老师①这句话的for which中的for是怎么出来的呢？②用of可以吗？为什么？

问题 as 用法

Transitions between stages could be marked with sabbatical as people find time to rest and recharge their health,re-invest in their relationships,or improve their skills.as 什么用法，求大神讲解!

问题 介词短语可以省略介词吗

It was scheduled to be played this weekend.this weekend 是介词短语吗，介词短语可以省略介词吗？谢谢老师的回答。

问题 将来时的用法区别

You won't die.You won't go to die.老师，请问这两句子有什么区别。用法不相同？

问题 状语从句的时态问题

I would be grateful if you kept this news to yourself until he came back.这是时间状语从句么，这里为什么要用到came呢?

问题 句子主语的省略

请问These creative inventions bring us great convenience，arouse our passion for future life,and help society to move forward. 这里为啥两个谓语动词啊 省略主语可以不加连词的么？

问题 独立主格结构判断

Too much work waiting for us, we declined this invitation.这句话中waiting for us 是现在分词做后置定语吗？前面这个分句是独立主格结构吗？能不能用to be waited？

问题 whether的虚拟语气

All people, be they young or old, are required to be citizens of high ideals.请问老师，这里为什么会用虚拟？不论年轻还是年老。

问题 请问为什么I have written for a week.这句话是错的？

...非持续性动词的理解》提了一个例句，“I have written for the newspaper for 10 years.”我觉得这句和I have written for a week. 很类似啊，不太明白为什么前者是对的后者是错的。请您指点迷津。谢谢。

问题 begin doing ...

Foreign nationals have begun leaving because of a sharp rise in violence.  因为暴力活动的急剧增加，外国人已经开始离开这个国家。begin doing 和 begin to do 是一样的吗？

问题 英语常用缩略语分析

经常看到如下的英语形式，不知道是什么完整形式？包含了什么语法点？请老师帮忙补全，谢谢。to be continueddirected bymusic bypowered by

问题 involving的相关问题

Being involved in community service does good to improving teenagers’ comprehensive abilities. 老师，这里是动名词做主语，这里的Being involved,可以改为involving吗？

问题 省略成分

Many adults may think they are getting enough shut-eye,but in a major sleep study almost 80 percent of respondents admitted to not getting their prescribed amount of nightly rest. 请问老师study后面是不是省略了什么？谢谢

问题 独立的句子变为不是句子

global temperature rise 是一个独立的句子，不能放在及物动词之后改为  this causes global temperature to rise  就是正确的，为什么？

问题 句子成分划分

Ants are so much like human beings as to be an embarrassment.请问老师，这个句子的成分应该怎么划分，as后面的内容不知道如何翻译？从来没见过这样的句型，麻烦老师解答一下，谢谢