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问题 twice的用法

Twice that much may fall higher up at 4000 feet. Twice that many used cars had been sold. 老师请问，这里twice that和twice many是什么用法呢？谢谢了

问题 as...as难句分析，以及为什么第二个as后出现了doing动名词结构？

That's why today I'm calling on each of you to set your own goals for your education and to do everything you can to meet them。Your goal can be something as simple as doing all your homework, paying attention in class, or spending some time each day reading a book.以上，出现了as...as...

问题 成分分析

Skimming those to decide whether or not you wanna  read the whole article should cut down some time.划线部分整个是主语，内部我该如何理解啊？to decide 后面是宾从吗？后面怎么跟了个句子呢？

问题 句子分析

To be responsible for something means to have the job of getting it done or taken care of . of.....是介词短语做the job宾语补足语吗？ done和taken care of是it的宾语补足语吗？

问题 关于however后边的句子成分问题

The cavalry (which was then in the vanguard, out of sight) had to take it in the neck, however, their only possible precautionary measure being to seek cover if it was available, otherwise merely to scatter as widely as possible, but always remaining mounted.请教老师，however作为连接...

问题 虚拟语气

I expected to have done it, but I was busy.I had expected to do it, but i was busy.二者有区别吗？

问题 英语难句分析

Throngs such as had never been known before in the history of the United States rushed to hear them.专家帮分析一下这个句子。

问题 这句话有无错误

Though having been ill for years，he is now quite well. 虽然他病了好几年，现在却完全好了。 请问这句话有无错误？怎么改好?

问题 end后的词性

Work hard, or your job will not end successfully.我觉得句末的副词successfully应该改用形容词successful。请专家老师指导。

问题 状语从句省略规则

Maintain:to preserve or keep things as they are. 这个句子后面是as引导的方式状语从句？are后面是省略？省略了什么？ 状语从句省略有什么一般规律吗？ 谢谢老师解答！

问题 whether 什么词性

Whether to evaluate poetry or paintings, I tend to forsake what others treasure but cherish what others abandon.请问老师whether 什么词性，在这里是怎么用的？

问题 过去分词的用法

It weighs two kilos. Would you like it sent via airmail or via surface mail？此句中 sent 是过去分词修饰it么。还是这里有省略了ou

问题 请问 mental register 是什么意思

...ven spiritual register. It’s true, the older I get, the more I feel time has wings. But with reading, it’s all about the present. It’s about the now and what one contributes to the now, because reading is a give and take between author and reader. Each has to pull their own weight. There are b...

问题 现在分词作后置定语的疑问

偷电脑的那个人被抓了。误：The man stealing the computer was caught. 误：The man having stolen the computer was caught. 正：The man who stole the computer was caught. 为什么上面的误句有错误？现在分词作后置定语不是很普通的用法吗？如：There is a door le...

问题 主句与从句主语不一致引出的混乱

...样一组对话：Jane: The young folks today are so shocking. Why, when I was their age, you wouldn’t kiss your husband in public, let alone some of the things these children do! Alan: Other times, other manners. 不明白句中 when I was their age, you wouldn’t kiss your husband in ...