必修3Unit1情态动词改概览.ppt

4. 表不满或指责，用于肯定句或疑问句，意为“非得”“必定会”。 1 If you must smoke, please go outside. 2 My car must break down whenever I’m in a hurry. 3 Must you spit on the floor? The toilet is so near! 陷阱提示 must: 1. mustn’t只表示“不可以，不许”； 不表示猜测“一定不会”！！！ can’t 2. must 只对现在表猜测，不对将来猜测！！ 3. I have told you the truth. ______ I keep repeating it? （10江西） A. Must B. Can C. May D. Will must should 1 The light is on. He _____ be at home. 2 It is 10 o’clock. Mr. King ______ be at the office. 1. You’re using Iphone 5s! You _____ have a lot of money! 2. —When can you finish your design —It __________ be ready before you need it. will 的主语是第一、二、三人称的陈述句，表意愿或承诺自己（将如何）。 1） If you will come to my house，I will show you my new painting. 2）-Please remember me to your family. -I will. 3 –Don’t forget to bring your homework. -I won’t. 2. John promised his doctor he ___ not smoke, and he has never smoked ever since. 08北京） A. might B. should C. could D. would （2011上海春招）Some young people these days just ____ go out of their homes to contact the real world. A. mustn’t B. won’t C. mightn’t D. shouldn’t 考点集锦： must猜测只用于肯定、现在；mustn’t “不可以” 2. can猜测只用于疑问、否定句；could都可以； 3. should/may/might猜测可用于现在和将来,肯定和否定； 4.must有“非要”的意思；can有时表示“有时会”； 5. shall表示“一定会，必须”，说话人意志十分坚定； 6. will/would表示现在/过去“常常会”；will表示承诺 或意愿。 * modal verb 情态动词表说话人的某种感情 或语气，对某一动作或状态的 某种态度。表示“需要、可以、 必须、应当”等。 情态动词 modal verbs 情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语． 只作情态动词的　　can/could, may/might, ought to， must 可情态可实义的　　need, dare 可情态可助动词的　shall/should, will/would 相当于情态动词的　have to, used to 1 Some of us can use the computer now, but we couldn’t last year. 2 The new-built theatre can seat 1500 people. 3 Can she be in the computer center? 4 I thought what he said could not be true. 5 Can/Could I use your dictionary? 6 Could you lend me a hand? 1.表能力 3. 表示“请求” “允许” 表请求时，口语中常用 could 代替 can 使语气更委婉，回答时用can 2. 表示推测 “可能”，can只用于疑否句，could不限 1. can 与could 4. 表示“许可”，可与may 换用。 You can go home now. 5. can 用于疑问句或否定句中时，表惊异、 不相信