辅导书上有这样一个句子：For some reason the charcoal wasn’t catching.请问为什么reason没有用复数？reason在这里是不可数名词吗？句子意思如何理解？谢谢！如题
书上说：如果要对过去情况作推测，即对过去已经发生的情况作推测，不能只用can的过去式could后接动词原形来表示，而要在can或could之后接动词的完成式。真是这样吗？英语不是可以这样说吗？He could be...
I am sorry you ______ the last bus. It left ten minutes ago. A. have lost B. lost C. missed D. have missed. 此题我认为应选C，...
原句：
family 可以表示家人，five family 为什么不对呢？
We are a united team.
It is hard to believe that he is all right.
请问：common与same的区别？谢谢！如题
Answer D is definitely the right answer. A is nearly correct too, but since were talking in the pr
我见过定语从句中用from which的用法。如下面的句子（从资料上抄的）： This is the book from which I got the story. 这就是那本书，从中我读到这个故事。 Where is the...
They have the tests in three days.
He has had to cook by himself__________his mother went on business to Beijing.A since Bafter请问这里为何不能用after如...
She has worked as a nurse until past her 60th birthday.专家，这里的完成时态怎么和until搭配了？什么意思？另外，若改为一般过去时态，两句有什么含义上的不同呢？敬请专...
请问各位go in the room, go inside the room和go into the room有什么区别呢？谢谢！
关于持续性终结动词在实际使用中的疑惑，希望帮我答疑解惑！I have just arrived by train.这里的arrive 是持续性终结动词，这里arrive的到达是表示乘火车已经到达了车站，与目...
apple tree中apple是苹果，tree是树，那as though中though是什么意思？如题