中考英語：名師談中考英語動詞時態(tài)正確理解與使用

　　南開中學 李士明

　　CORRECT USAGE OF TENSES OF THE PREDICATES

　　如何學好情態(tài)動詞

　　(Modal verbs)examda

　　can: 從客觀角度陳述人們都了解的客觀事實

　　●can 表示客觀能力, 與先天、后天能力無關(guān)。

　　Birds can fly up into the sky easily.

　　鳥兒可以輕易地飛到天上去。

　　Luke can speak Chinese very fluently.

　　魯克的漢語說得很流利。

　　●can表示人人都了解的客觀可能性或聽話人已知的客觀事實。

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

　　如果你不畏艱險，所有的困難都一定會克服。

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

　　正確的理念一定能夠轉(zhuǎn)化為改變世界的物質(zhì)力量。

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

　　聽說你要去泰國，我看到那兒去挺危險的。

　　may: 表示說聽雙方均不確切，相當于I am not sure

　　●推測或了解可能性

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

　　May I have a talk with you?

　　He may never succeed without your help.

　　●基于may自身的不確定性，常置于句首，用來表示祝愿

　　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. (口語中can和may從不同含義角度均可使用。)

　　ought to: 從客觀角度表示安排、責任或義務

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

　　你放學后應該做衛(wèi)生，因為今天你值日。

　　You ought not to write so carelessly.

　　(It is the students’ responsibility.學生應該做好的事)

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

　　(在反義疑問句中should和ought to有時可以前后交叉使用，起到主客觀互補的作用)