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CORRECT USAGE OF TENSES OF THE PREDICATES 如何学好情态动词 (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 | 
