文档介绍：语法专题六：情态动词
—、综述
时态往往和语态在出题方面结合比较紧密，而情态动词和虚拟语气也有类似之处。情态动词有一 定到意义，但不能独立作谓语，往往和后面到动词原形一起构成谓语部分，在不同到语境中表达不同到情 感和语气，从而突出语言在
. He may well not our head teacher as he said he has gone to Zhengou for a meeting.
他很可能不是我们的班主任，因为他说他已经去郑州开会去了。
总结：can't不可能（语气最肯定）；
well may not很可能不（语气比较肯定）；
may not可能不（语气最不肯定）
表示惊异或怀疑，常用语疑问语气。
？
How can it be true?
？
What on earth can this mean?
表示请求，口语中常常用could代替can语气更委婉。
.…Can I go now?
•“ Yes, you can. / No, you can，t・
e・g・---Could I come to see you tomorrow?
■一 Yes, you can. （No, I'm afraid not.）
？
Could you wait a few days for the money?
？
Could you be here at eight o5 clock tomorrow morning?
在将来时和完成时中只能用be able to
。
I am sure I will be able to get this job soon.
。
They have been able to finish the work on time.
表示经过努力而成功地办到某事，用be able able to相当于:succeed in 或 manage to
，他终于通过了考试。
After years of hard work he was able to pass the final exam.
表示一次性的事情，多用be able to, be able to 一般不表示经常性的事件。
，你就能够解出这道数学题了
After studying this formula you will be able to solve the math problem.
carftwait表示"急于做某事”相当于be eager to——
. I can't wait to read this story book.
我非常渴望读这本故事书。
. I couldn't wait to see her.
我渴望见到她。
can not——too—— 表示"再——也不为过”；"越—— 越好"。类似的用法还有：can never ---too---; can not ——enough; can never --- enough.
。
We can not be too careful in doing experiments.
。
Drinking water can never be clean enough.
。
I think it right that one can not learn too much knowledge.
。
We can not praise him too much.
二）、may 与 might
表示“允许”；“可以”
. --- May I ask you a question?
---Yes, please.
. --- May I watch TV after supper?
一-Yes, you may.
（or No, you'd better not.）
. Might I use your telephone?（比用 may 语气更婉转）
表示可能性的推测
含有“或许、大概或可能”的意思（多用于肯定句中）.might代替may时，语气将显得更 加不肯定。
。
I hear there may be a few bo