情态动词may表示允、也，意为“可以，也，可能”。对may的一般问句的回答，肯定回答一般是:Yes, please./Certainly./ Sure等，否定回答一般是：Please don't./No，you can't/mustn't. Where is Helen? She may be at home. I couldn’t find Cindy, she might be at home.May I come in, Madam? Yes, please.May I borrow your dictionary? Certainly.May I use your computer? Sorry, you cannot. I am using it now.May I smoke in this room? No, you mustn’t!may, might 1) 表示“请求”和“允”.might比 may语气更委婉.否定回答时可用can’t 或mustn’t,表示“不可以,禁止”.---- May/Might I take this book out of the room? ---- Yes, you can.(No, you can’t / mustn’t.) 用May I...征徇对可时比较正式和客气,而用Can I...在口语中更见.用祈使句,表示祝愿. May you succeed! May you have a good time.May you be happy! May you succeed!3) 表示推测、可能性（不用疑问句）.might是may过去式,它所表示的可能性比may小.1. He may /might be very busy now.2. Your mother may /might not know the truth.用法区别 用位置may bemay为情态动词，be为动词原形 句中，作谓语maybe副词，大概、也，相当perhaps句首，作状语He may be right, but I’m not sure. must/have to1) 表示必须、必要.You must come here before 7:00 o’clock tomorrow. You don’t have to come here before 7:00 o’clock tomorrow. |
