on discussion 和 under discussion 都可表示“在讨论中”，都是固定搭配（都用介词on且都不用冠词）。请问它们有区别吗？如题
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语法书上讲到：
With the mass production of pencils, they are getting drastically more popular in many countries with each passing decade.句中的with the mass production of...
好。我看到这样一个句子，We had hoped to give you a chance such as nobody else ever had. 怎么翻译是，我们本来希望给你一个别人从未有过的机会。所以，这句话是虚拟语气吗...
make sure后接从句时要用一般现在时表将来吗？还是可以用一般将来时表示将来？如题
我知道 there be 句式也叫存在句。请问这里的 be 是系动词吗？
What happened to her？在该句中，为什么没有助动词？网上有种说法是happen为不及物动词所以不用助动词，这种说法成立吗？还是因为what本身做某种主语，所以不需要助动词？
"one," the old man said. His hope and his confidence had never gone. But now they were freshening as when the breeze rises.（海明威老人与海）。为什么句中出...
有本书上说，要表示汉语中说的“同意某人做某事”，不能说成agree sb to do sth，因为它不符合英语的表达习惯。我的问题是，如果真要表示汉语中的“同意某人做某事”，那英语该如何表达呢？请帮我归纳尽可能多...
一般说来，祈使句都以动词原形开头。如：drive carefully. 小心开车。Be quiet, Tom. 汤姆，安静点儿。Have a cup of coffee! 喝杯咖啡吧!Remember to switch off all the lights. 记着把所有的灯关掉。但...
为什么such放在开头?能否详细讲解一下这类句子？Such is the elegance of this typeface that it is still a favourite of designers. 这种字体很优美,至今深受设计人员喜欢。 这是倒装句吗？如果是的话可...
If youd come along and support us, wed really appreciate it. 如果你能前来支持我们，我们真的会为此感激不尽。
You will find it strongest and more violent where there is the lowest degree of culture.（张道真大学英语语法书)