【正文】 He said they must work 。如：She may be in the classroom . 她可能在教室里。以上結(jié)構(gòu)常帶有說話者的 責(zé)備的感情色彩。You shouldn’t feel so unhappy over such little things.對于這種小事，你不應(yīng)該感到這么不高興。（3）can’t還可用來回答“ May I …? ”這樣的問句。（事實上你沒有完成。Do you dare tell her what I said? 你敢告訴她我說的話嗎？I didn’t dare look at him. 我不敢看他。The light is on, so he must be at home ，他現(xiàn)在肯定在家。Could you do me a favor? 你能幫我個忙嗎？—Could I use your pen? 我能用一下你的鋼筆嗎?—Yes, you 。表示能力時一般譯為“能、會”，即有種能力，尤其是生來具備的能力，此時may和must均不可代替它。She may be at . (3) .may的過去式為might，表示推測時。—No. you needn’t /don’t have ，你不必。s go for a walk after supper.(2).用“What/How about...?”來提出建議；about后接名詞或動詞ing形式。（一定不能說there will have）There are many students in our school.→There will be many students in our school. There will be a sports meeting next week.一定不能說：There will have a sports meeting next week.will與be going to do something區(qū)別：①. be going to表示近期、眼下就要發(fā)生的事情，will表示的將來時間則較遠(yuǎn)一些，He is going to write a letter tonight. He will write a book one day.②. be going to表示根據(jù)主觀判斷將來肯定發(fā)生的事情，will表示客觀上將來勢必發(fā)生的事情。2. may的否定式為may not，譯成“可能不”，He may not be at 。More and more trees must be planted in 。You could have stayed with the Smiths while you were in New York (but in fact you stayed in a nearby hotel .) Could Mr Li have helped this girl student?“may/might+完成式”表示“過去可能，本來可以于某事而實際上沒有干”，might的可能性較小，語氣較弱。（2）不能。She is used to eating ?！　∫谆禳c五：must和have to 。He has been able to 。The man may be the headmaster.—Where is Mr Li?—He might be working in his office. —May Mr Li e?—He might not e here.Could表示推測時，語氣can比要弱，說話者留有余地。4.（1）needn’t意為“不必”。Could you do me a favor ? 你能幫我個忙嗎？—Could I use your pen?我能用一下你的鋼筆嗎?—Yes, you 。Would you like a cup of tea?　Would you like to go and see her?因此，如果我們說：“去游泳好嗎?”英語中可有這樣幾種表達(dá)法：Shall we go for a swim?　Let39。Your car needs mending. = Your car needs to be 。You must stay here until I e back. 在我回來之前你必須呆在這兒。Can the news be true ? 這個消息會是真的嗎？—Can it be our teacher ? 那個人有可能是我們老師嗎？—No, it can’t be our teacher. He is on a visit to the Great Wall.不可能。（3）.表示推測，意為“可能”，常用于否定句和疑問句中，此時can’t譯為“不可能”。May you be happy!祝你幸福！May you succeed！祝你成功！4. must的用法：