unit 1 festival around the world Grammar.pptVIP

may; might I asked if I _____ go home half an hour earlier today. There ____________ not be enough money to pay for the repairs. might may / might will; would When he got older, he _____ never do his homework. Nancy _____ keep talking unless you tell her to shut up. would will shall; should By now, they ______ already be in Dubai. I _____ be replaced by someone from the New York office. should shall must; can’t You _____ have stayed up. You look so tired. You _____ be 45! I thought you were about 25 years old. must can’t Harvest and Thanksgiving festivals can be very happy events. (P2) [考点] 情态动词can的用法。 [考例1] It is usually warm in my hometown in March, but it _____ be rather cold sometimes. (福建 2008) A. must B. can C. should D. would 考点点拨 考例回顾 选B。can表示“可能”，意为“有时天气可能会相当冷”。must必须、肯定；should应该；would表示过去常常。 [考例2] You _____ be hungry already — you had lunch only two hours ago! (浙江 2008) wouldn’t B. can’t C. mustn’t D. needn’t 选B。此题考查情态动词表推测。can’t意 为“不可能”；mustn’t意为“禁止、一定不 要”；wouldn’t常表示对现在或将来情况 的虚拟；needn’t意为“没有必要”。 以could或would提问时，不能再以could或would作答，而应该用can或will。如： —Could I borrow your dictionary? —Yes, of course you can. —Would you come with me? — Yes, I will. may 和might ： may 常用来表示： ?A. 表示请求、允许; 比can较为正式: ?? e.g. May I come in ? You may go now. B. 表示说话人的猜测: “也许” “可能”: 通常只用于肯定句和否定句中。 e.g. --I believe the man is from England. --But I may be wrong. The guest may arrive this afternoon. 在肯定句中，may的可能性比can 高，may表示现实的可能性，can表示理论上的可能性。如： The road may be blocked. 这条路可能不通了。 The road can be blocked. 这条路可能会是不通的。 在疑问句中，表示可能性用can。 如：Where can he be? 他会在哪呢？ C. 表示祝愿;但语气较正式: e.g. May you succeed! May you have a good journey! might 的用法有: 多在间接引语中表示过去的可能和允许。如: She said that he might take her bike. 她说他可以拿她的自行车去用。 除