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问题 while与since的用法与理解

...什么好，我觉得写成since更合适：Archaeologists find that even the most isolated residences during the eleventh and twelfth centuries obtained some pottery, and probably food, from some distance away, while major ceremonial events were opportunities for sharing food and crafts.我觉得...

问题 最高级与比较级的转换

Canada is the second largest country in the world .Canada is larger than ______________ country in Asia .   A. any         B. any other最高级 = 比较级 + than any other + 可数名词单数但是这道题答案选A.，为什么？  求老师解释，谢谢！

问题 一个虚拟语气的重大疑问（现在还是过去）

下面句子中用的虚拟语气用得对吗？We would be back in the hotel now if you didn’t lose the map. 如果你没有把地图丢了的话, 我们现在就回到旅馆了。我觉得用得不对。因为我觉得从句应该用过去完成时，因为说话时地图已经弄丢了，...

问题 状语从句中的时态问题

We won’t start the work until all the preparations ________.A. are being made    B. will be made      C. have been made D. had been made答案为C。请问这种情况为什么不用现在时呢？A 可以么？现在进行时算作一般现在时，这里现在...

问题 percent of后面的名词前到底用不用定冠词

下面两个表达我都见过：30 percent of money30 percent of the money30 percent of people30 percent of the peoplepercent of后面的名词前到底用不用定冠词?

问题 介词作宾语的例句如何理解

...Article/201202/2772.html 5. 用作宾语A man stepped out from behind the wall. 一个人从墙后面走出来。He cannot spare any time except on Sunday. 除星期日外，他抽不出时间。I won’t go home until after the exam. 我要等考完后再回家。我觉得介词...

问题 as后面接动词ing是作什么成分

Xi envisioned the development and application of AI as greatly enhancing the level of economic and social development and improving public services and urban management.这个句子里的as作什么成分？是什么意思？为什么as后面是接动词的ing形式（enhancing和improving.）？

问题 怎么理解that is

...一个问题Research has found that IQ predicted leadership skills when the tests were given under low stress conditions，but under high stress conditions，IQ was negatively correlated with leadership—that is, it predicted the opposite.这个句子中的that is怎么理解，前面句的...

问题 back和down的词性与用法

I forced the heavy silver spoon back of her teeth and down her throat.请问句中back和down是什么词性？我理解back of 是副词短语，作spoon的宾语补足语，如果是名词，个人认为back前应加the。down作介词引导名词her throat, 如果是副词,似乎不能修饰her t...

问题 有关情态动词虚拟的问题

...? She should be here by now.(she isn’t here yet,and this is not normal)2.The price on this packet is wrong. It should be $2.50,not $3.50.3.That man on the motorcycle should be wearing a helmet.

问题 口语中what’s up?的意思

...义吗？—what's it about？—It's about this boy who goes out to sea...还有这里的this？觉得这两个this出现的很“突然”。盼望专家老师解惑。

问题 15-year-olds可以表示一类人吗

No way! I don't think _______ should be allowed to drive.A. fifteen years oldB. fifteen-year-oldsC. fifteen-year-old这道题选 B，对吗？这样可以表达一类人吗？   求老师给出解答？谢谢！

问题 right与rightly在选择题中的区别

—He hit me!—It serves you ______. You shouldn’t have been rude to him. A. right    B. rightly请问如何选？同时请老师说说 right 与 rightly 的区别，谢谢！

问题 定语从句和分词作定语有什么区别

... keep their word. 如果想用分词修饰，I don’t like people failing to keep their word 这样对吗？2. 同一个修饰成分，如果既可以翻成定从，又可以翻成分词结构，那它们使用范围有什么区别呢 比如感觉分词更不正式？因为看政府报告里...

问题 名词后的不定式是作定语还是作状语的区别

Do you have a permit to park here? 请问这里不定式是定语还是状语? 如果是状语，叫什么状语？谢谢专家！