专题06 情态动词（讲）（PPT）-【中职专用】中职高考英语一轮复习讲练测（精讲精练）

动词 Verb 动词 情态动词 情态动词表达 允许… 请求 命令 推测 建议 拒绝 能力 虚拟 常用情 态动词 can/could be able to may/might need／dare must/ have to should ought to had better will/ would shall/ should 情态动词特征： 后接动词原形 2. 不能单独做谓语,要和动词原形一起构成谓语动词。 3. 无人称和数的变化:I ／you／ he／ she／ it ／we／ they can 情态动词的否定式 shall not--- shan’t will not---won’t can not ---can’t must not --- mustn’t should not---shouldn’t would not---wouldn’t could not---couldn’t dare not---daren’t need not---needn’t may not ---mayn’t might not ---mightn’t ought not---oughtn’t 一. can/ could/be able to+动词原形 Can you play the piano? 1.表能力、能够(could是过去式） 2. Can (could)表“允许” Can ／Could I go now? You can use my computer. 3. can 表请求.此时can和could没有时间上的差别，could更委婉。 Can you teach me to play volleyball? Could you teach me to play volleyball? 语气更委婉 一. can/ could/be able to+动词原形 1. Can you play the piano? 2. Lang lang could play the piano well when he was only three years old. 3. His brother was able to take care of himself when he was ten. 1.表能力、能够(could是过去式） 2. Can (could)表“允许” Can ／Could I go now? You can use my computer. Can you teach me to play volleyball? Could you teach me to play volleyball? 3. can 表请求.此时can和could没有时间上的差别，could更委婉。 语气更委婉 could 提问表请求的句子通常回答不用could,应该用can。 Are you able to swim? He is able to afford his family. I was not able to but I am able to now. If he works harder, he’ll be able to pass the next exam. He has not been able to get there before dark. 3、be able to（能）+动词原形。 有人称,数和时态的变化,can只有现在时和过去时，因此在will, have等后要用be able to A computer _______ think for itself, it must be told what to do. A. can't B. couldn't C. may not D. might not 二. may / might --May I have a dance with you? --Yes，you may. (Yes, please.) --No, you mustn’t. --No, you’d better not. 1. 表“可以”，“允许” might 是may的过去式 2.表可能性 The news may or may not be true. 消息也许是真的，也许是假的。 3.may表祝愿 May you succeed. You _____ borrow my car if you drive carefully. Will be able to B. may C. Have