情态动词的用法情态动词的用法情态动词的基本用法特点1 ） 情态动词 除 ought 和 have 外，后面只能接动词 原型。2 ） 情态动词没有人称，数的变化，即情态动词第 三人称单数不加 -s 。3 ） 情态动词没有非谓语形式，即没有不定式，分 词，等形式。 高中阶段都学过哪些情态动词呢1 can / could / be able to2 may/might3 must / have to4 shall / should5 will / would6 need / dare7 ought to1 can / could / be able to1 Some of us can use computers now, but we couldn't last year. （能力）2 It will be sunny in the day time ,but it can rain later on this evening （客观可能性）3 ---Can I go now ? yes ,you can （请求和允许）4 Could you wait a few days for the memory?（请求）5 1 Can this news be true? 2 It can't be our headmaster.he has gone to Beijing. （表推测，主要用于否定和疑问） *be able to 能用于各种时态。 can / could 只能表示现在或过去的能力。 *was / were able to : “ 设法做成某事” 相当于 managed to do sth. succeeded in doing sth. 。1. can 与 be able to 有何区别？1. A computer ______ think for itself; it must be told what to do. A. can’t B. couldn’t C. may not D. might not2. The fire spread through the hotel very quickly but everyone ______ get out. A. had to B. would C. could D. was able toA D 3. They will ______ run this machine on their own in three months.A. can B. could C. may D. be able toD 2 may / might1 May I watch Tv after supper? Yes you may /No ,you mustn't. （请求许可 )2 It may be true ./ she may come tomorrow/ He might have some fever （推测）3 May you succeed ! May you have many more days as happy as this one （祝愿）may/ might as well 还是 ----- 好we may as well stay where we are5. — Could I borrow your dictionary? — Yes, of course you _______. A. might B. will C. can D. should6. ...
