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学习方法：如何学好情态动词

发布时间：2009-09-09 编辑：查字典英语网小编

(Modal verbs)

can: 从客观角度陈述人们都了解的客观事实

●can 表示客观能力, 与先天、后天能力无关。

Birds can fly up into the sky easily.

鸟儿可以轻易地飞到天上去。

Luke can speak Chinese very fluently.

鲁克的汉语说得很流利。

●can表示人人都了解的客观可能性或听话人已知的客观事实。

If you are brave enough, all difficulties can be overcome.

如果你不畏艰险，所有的困难都一定会克服。

Correct ideas can be transformed into a material force that changes the world.

正确的理念一定能够转化为改变世界的物质力量。

I hear that you are going to Thailand. It can be dangerous to be there, I think.

听说你要去泰国，我看到那儿去挺危险的。

may: 表示说听双方均不确切，相当于I am not sure

●推测或了解可能性

The man you are looking for may be in that room.

May I have a talk with you?

He may never succeed without your help.

●基于may自身的不确定性，常置于句首，用来表示祝愿

May success attend you! 祝你成功！

(May) God bless you! 愿上帝保佑你！

●You can/may come at any time. (口语中can和may从不同含义角度均可使用。)

ought to: 从客观角度表示安排、责任或义务

●You ought to do the cleaning after school BECause you are on duty.

你放学后应该做卫生，因为今天你值日。

You ought not to write so carelessly.

(It is the students’ responsibility.学生应该做好的事)

Everybody should /ought to help each other in the study, shouldn’t / oughtn’t they?

(在反义疑问句中should和ought to有时可以前后交叉使用，起到主客观互补的作用)

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