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问题 he is 能否缩略的问题

He used to be much better off than he's now.请问这里的 he is 可以缩略成 he's 吗？为什么？

问题 有关倒装句的疑问

Only once these requirements are fully satisfied is the oil allowed to be sold as certified sustainable palm oil (CSPO).请问老师，这句话里is提前的什么语法现象，没见过这种倒装句。

问题 ever和not的位置关系？

...in voting,which is different than absentee voting, but never in the historyof the federal elections have we ever not held an election, and we should go forward with our election.我理解总统对邮件投票的担忧，与缺席投票不同，但是在联邦选举的历史上我们从来没有取...

问题 有关will not 和should not用法的习题

They _______ allow parking here. The street is too narrow. A. won't              B. shouldn't 感觉 A 和 B 都能选，答案是 B。“他们不允许在这里停车。街道太窄了。”把后一句理解为一个原因，这样不...

问题 虚拟语气(It's strange you should do/should have done)

It is strange that you ______ (say) such a thing.答案是 should have said。名词性从句不是应该用should do 吗？答案为什么不是 (should) say?

问题 口语中单独用agreed作答

口语对话：—The last one to arrive pays the meal.—Agreed!请问答句中的 agreed 是过去式还是过去分词？在口语中可以单独用 agreed 作答吗？这是一种习惯用法吗？谢谢！

问题 take（花费）可用哪些成分作主语

take表示“花费”时，通常用于it takes sb some time to do sth，请问take除用于这个句式外，还可用于哪些句式，可用哪些成分作主语？

问题 that引导同位语从句

More amazement that the mighty United States could be so vulnerable to terror. 更多的不可思议：强大的美国居然如此不堪恐怖分子一击。that引导同位语从句，对吗？

问题 句子成分划分（这是省略句吗）

Expect today to be partly sunny and partly cloudy.请帮忙划分一下句子成分，并作一个简要的说明，谢谢。

问题 现在分词 missing 的用法疑问

They begun to restrict and banned ocean-going voyages, thus missing out on an important opportunity for development.这里的missing为什么要用分词形式呢？

问题 长难句解析

If losses were to occur which he could repair by using his reserve fund, what assurance would he have that another loss-the same kind or different---might not occur next week, next month?句子结构不太清楚，这句话什么意思呢？

问题 不定式是否省略的判断

这个句子里的stay是省略to的动词不定式吗？calm是名词吗？The training improves pupils’s performance by helping them stay calm and deal with stress.

问题 short and sweet 是什么意思

The chairman promised to make the introduction short and sweet. 句中的 short and sweet 是什么意思？

问题 less...than... 后的

This may be because the lower moisture content, which is 12.8% for the MC, generates less expansibility and contractility than is necessary to destroy the soil skeleton.请问老师，这个句子在than后是不是省略了that呢？

问题 关系代词作表语的疑问

Our school is no longer the school that it used to be.书上说 先行词主句做表语指物并且关系代词在从句做表语用that。上面那句话怎么分析啊，如何确定是做表语呢?