can: 从客观性视角阐述大家都掌握的真理的客观性

　　●can 表明客观性工作能力, 与先天性、后天性工作能力不相干。

　　Birds can fly up into the sky easily.

　　小鸟能够随便地飞往天空去。

　　Luke can speak Chinese very fluently.

　　鲁克的中文说得很流畅。

　　●can表明每个人都掌握的客观性概率或聪明人已经知道的真理的客观性。

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

　　假如你不畏艰难，全部的艰难都一定会摆脱。

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

　　恰当的核心理念一定可以转换为*的物质力量。

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

　　听闻你需要去泰国旅游，我看到那里去挺风险的。

　　may: 表明说听彼此均不准确，等同于I am not sure

　　●推断或掌握概率

　　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.

　　●根据may本身的可变性，常放置句首，用于表明祝福

　　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. (英语口语中can和may从不一样含意视角均可应用。)

　　ought to: 从客观性视角表明分配、义务或责任

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

　　你下课后应当做环境卫生，由于今日你值日。

　　You ought not to write so carelessly.

　　(It is the students’ responsibility.学员应当搞好的事)

　　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有时候能够前后左右交叉式应用，具有主观因素相辅相成的功效)