2011年08月22日 09时00分，《2011英语:2011年工程硕士GCT英语复习辅导专栏8》由出国留学网liuxue86.com英语编辑整理.
重要考点
That 一般不可以省略
只能使用whether表示是否， if 不可以；但as if 可以
The question is whether they will be able to help us. 问题是他们是否能帮我们。
All this was over twenty years ago， but it seems as if it was only yesterday.所有这一切过去20多年了，但似乎刚刚是昨天发生的一样。
用何连词看从句中缺少什么成分来决定
宾语从句
1. I understand that he is well-qualified， but I feel he needs more experience.
2. I am sorry that you’re ill.
3. He made it quite clear that he preferred to study English.
4.They told us once again that the situation was serious.（that不可以省略，否则有歧义）（省后可译成：他们再次告诉我们形势很严重。/他们告诉我们形势再次很严重）
5. I haven’t the least interest in what he is doing.
6. We have no definite information yet as to which route he will take.
7. She is sorry for what she said.
重要考点
That 在不引起歧义时可以省略
动词宾语从句中，whether if等同，介词宾语从句中只用whether
I don’t know whether/if he will come.
I have no idea as to whether he will come.
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