The question being discussed
was presented by the headmaster. 这句话等于The question which is being
discussed was presented by the headmaster.还是The question which was being
discussed was presented by the headmaster.
老师，您好！ 主将从现中，从句的时态，一般要使用一般现在时，然而，为什么有些从句中会使用现在进行时呢？例如：If it's raining tomorrow, the sports can take place indoors.（为什么不说If it rains tomorrow? 二者有何区别？） I...
...。请问as a matter of national security是 public education 的后置定语吗？one是引导非限定性定语从句，并且指代前面一句话吗？ turned their focus to public education中的to public education是宾补还是方向状语？
例句：the centre was simultaneously looking to a timewhen leading researchers could also be artists, writers and poets, and vice versa. 如果把vice versa整体当作副词的话为什么前面加了and？这是并列什么？
whether和if引导宾语从句什么时候可以互换？例如:1.I wonder whether he likes me or hates me. 2.I wonder whether he likes me or not. 3.I wonder whether or not he likes me. 这三句哪些可以whether换成if？
Learning words together that
are associated in meaning is a popular and useful way of organising your
vocabulary study这里together放在words和word的定语从句中间，这种用法对吗?
...derlie the globalization process.例2：I studied at Cambridge at the same time as(when/that) he did.例3：If you’re likely to be traveling on the same train as(that) I am, I’ll look out for you.例4：a few oil firms today could re-creat the same threats to competition that(as) were fe...
The suggestion where we should exercise regularly is very practical.这个句子看做是同位语从句能理解，但是个人觉得也可以看做是定语从句。We should exercise regularly in this suggestion. 在这个建议中我们应该经常锻炼。为什么这样理解是不对的呢？