英语：Unit1《Festivals around the world》语法情态动词（新人教版必修3）.docVIP

英语：Unit1《Festivals around the world》语法情态动词（新人教版必修3） Modal verbs（情态动词） 教师寄语：Just put one foot in front of the other and God will do the rest. may / might, can / could, will / would, shall / should, must / can的用法。 may 与might的用法 情态 动词 用法 例句 may 与 might 表示允许、许可。否定答语一般要用mustn’t，表示“禁止、阻止”之意。 --- May I watch TV after supper? --- Yes, you may. / No, you mustn’t. 在表示请求、允许时, might比 may的语气更委婉一些。在日常口语中，用can征询对方意见更为常见。 ---Might I use your telephone? --- Yes, please. --- May / Can I go home now? --- Yes, you may / can. 表示可能性的推测，含有“或许”“大概”“可能”之意，用might代替may时，则语气显得更加不肯定。 What he said may be true. She may come tomorrow. He might have some fever. 2. can与could的用法 情态 动词 用法 例句 can 与 could 表示能力 Some of us can use the computer now, but we couldn’t last year. 表示客观的可能性 It will be sunny in the daytime, but it could rain later on this evening. 表示请求和允许 --- Can I go now? --- Yes, you can. 表示请求,口语中常用could代替can,使语气更加婉转 Could you wait a few day for the money? Could you please show me the way to the station? 表示惊异、怀疑、不相信的态度（主要用于否定句、疑问句和惊叹句中） Can this news be true? It can’t be the headmaster. He’s gone to Beijing. How can you be so foolish! 3. will与would的用法 情态 动词 用法 例句 will 与 would 用于表示意志或意愿。Will指现在，would指过去 I will never do that again. They said that they would help us. 表示请求、建议等，用would比用 will委婉、客气些 Will you please take a message for me? Would you please pass him the book? 表示习惯性动作，译为“总是”“惯于”。Will指现在，would指过去 Fish will die without water. Every evening, she would sit by the window, deep in thought. 表示预料或猜想 It would be about ten when he left home. I thought he would have told you about that. 用于否定句中，表示“不肯”“不乐意” No matter what I said, he wouldn’t listen to me. 4.shall与should的用法 情态 动词 用法 例句 shall 用于第一、第三人称疑问句中，表示说话人征求对方的意见 What shall we do next? Shall I do the washing-up? When shall my brother be able to leave hospital? 用于第二、第三人称的陈述句中，表示说话人给对方的命令、警告、允诺或威胁 You shall go with me. ( 命令) You shall have a new dress for your birthday.（允诺） He shall be punished.（威胁） shoul