...didn't? 这里有many a time不应该用现在完成时haven't吗?didn't只能用在must have done表一般过去时的非被动语态里吗?
She must have been there yesterday, didn't she? 这里可以用wasn't she吗?wasn't/weren't只能用在must have been done被动句里吗?
这些 as 引导的是比较状语从句还是定语从句:1. He has as many books on information technology as I have. 他拥有的信息技术书和我拥有的同样多。(这是比较状语从句还是定语从句)2. I gave him as much as he could eat. 他能吃多少,我就给了他多...
让步状语指事实,用陈述语气,但是如果表现在或将来的假设情况时,使用be式虚拟或推定should+do,例如:Though he stand/should stand alone, he will never yield.但是even if/even though引导让步状语时,为什么不符合上述规律,却可以使用were式...
Electorally, it will be the last stand of the baby-boomers and the first poll in which voting will be dominated by generations younger than 40.汉语意思:从选举方面讲,...
I have colleagues working in Scandinavia who are also responsible for the main cities in Europe.表示一个人的职业和工作时为什么要用现在分词,而不用定语从句?上句中的working改成定语从句不好吗?谢谢老师的回答。