情态动词的特殊用法

2. May, might
• • • • *You may as well give him the letter. *You might as well stay at home tonight. 注=had better最好，用于提出建议。 *You might as well throw the money away as lend it to him. • *One may as well not know a thing at all as know it but imperfectly. • 注：may / might as well do A as do B 意为” 与其做B，不如做A。
should
• • • • How should I know? Why should he publish such a book? Who should write it but himself? 注： 在疑问句中，常与how, why, who等 连用，表示不合理，难于相信或不应该之 事。
shall
able to get to Antarctica • The ship was _______ in spite of the bad weather. could get to any port in • The ship _____ the world.
• • • •
SARS can be very dangerous. He can be very friendly at times. The road can be blocked. Our house is on the top of the hill, and in winter the winds can be pretty cold. • 注：can be用于推测某人或某物一时 的情况。意为“有时候会……”
Must的否定形式
• You must park your car here. must not park your car here. • You ________ • 注：表强制或义务，其否定应表示禁止： must not do
• • • •
Must we clean all the rooms? must Yes, you _________. No, you ____________. need not don’t have to No, you ____________.
Must的否定形式
• • • • • It must be eleven o’clock now. cannot be eleven o’clock now. It __________ You must have met him before. cannot have met him before. You _______________ 注：表推测，其否定为不可能：cannot
should
• I find it quite astonishing that he should be so rude to you. • It is a pity that you should be so careless. • I’m surprised that she should have done such a thing. • You can’t imagine that a well-behaved gentleman should be so rude to a lady. • 注：表惊讶，忧虑，惋惜等情绪，意为 ‘竟会，竟然’
Exe. 1
• The car fell into the ditch, but the was able to get out of it. driver ________ could get out of his car • The driver ______ quickly if there was an accident.
Must的否定形式
• We must get up at six tomorrow morning. need not get up at six tomorrow • We __________ morning. don’t have to geຫໍສະໝຸດ Baidu up at six • We ______________ tomorrow morning. • 注：表必须，其否定应表示不必：need not do 或 don’t have to do
• • • • • • • • • • • • • • • • • • • • • • •
1. should ①万一；②竟然 If you should change your mind, please let me know. —You shouldn’t have cheated in the exam. —I’m sorry you should think so. 2. must 偏偏，非要 You can have a day off, if you must. 3. can 有时会 It can be very hot in Taian in March. 4. may 但愿 May our friendship last forever. 5. shall 必须，一定 Candidates shall remain in their seats until all the papers have been collected. 6. will ①愿意；②（习惯）总是 If you will go to the party, I’ll go with you. She will listen to music, alone in her room for hours. 7. would （习惯）过去常常 He would sit there reading for hours. 点击:427评论:0查看更多文章>> 评论列表 暂无数据 共0条，当前第1页首页上一页1下一页末页 本次研修共有 班级数：1140 学员数：103479 作业数：852672 评论数：15578300 最后统计时间：2012/3/7 10:25:34
• You shall fail if you don’t work harder. 警告 • He shall have the book when I finish reading it. 允诺 • He shall be punished. 威胁 • 注：表说话人的意愿。 • House owners shall keep their gardens in a neat and ordinary state. 义务 • Each citizen shall carry his identification card when travelling. 规定 • 注：用在法律，条约，规章等文件中。
will
• • • • I will never do that again. I will do all I can to help you. I won’t let you down. 注：表主语的意志，愿望和决心。
would
• During the vacation he would visit me every week. • Every morning the man would sit at his desk, reading and writing. • 注：=used to表示过去反复发生的动作或 倾向。
情态动词+完成时
• • • • • • • could have done 本来可以做 cannot / could not have done不可能做 may/might have done可能会做 must have done一定已做 needn’t have done本不必做 （didn’t need to do:过去没必要做） should / ought to have done本应该做
1. can, could, be able to
• He was able to go to the party yesterday evening and he enjoyed himself very much. • He didn’t agree with me at first but I was able to persuade him. • 注：be able to =manage to do / succeed in doing 设法做成某事，与 can不同。
• 常见的情态动词表达法与考点：（注意人称,肯定句与否 定句的各自习惯用法） 1 表能力 can, could, be able to , 2 表请求 can, could, shall, may ,will, would, must 3 表允 诺，许可 can , may , shall, 4 表可能性 should, ought to 5 表必需，不得不, 不必要must, mustn’t, don’t have to , have to, needn’t 6 表建议 should, shouldn’t , ought to, ought not to, may, must 7 表习性 will, would, won’t wouldn’t 8 表肯定推测 must be , may be , must have done, could have done, may/might have done 9 表疑问 性推测Can…be…? Can…have done…? 10 表该做而实 际没做 should have done / ought to have done 11 表做了 不该做的事， 做了不必做的事， shouldn’t have done, needn’t have done 12 表祝愿 May you+原形动词！ May you be lucky! May you succeed!
• If you must smoke, at lease you use an ashtray. • If you must know, I’m going to help him look for an apartment. • Why must you buy that car? • Why must it always rain on Saturday? • Jane was never a pleasant young girl. After you gave her your advice, she must go and do the opposite. • The car must break down just we were starting our holiday. • *注：意为：偏要，硬要。指不耐烦或令人不