1、 GRAMMAR 情 态 动 词 null null null null 语 境 展 示 一 null 观察null面图画，并试着归纳 ought tonull should的用法null null 自 null 归 纳 一 null ought to null should的意思大致相同，都表示 null义务null要求或劝告null，只是 ought to比should的语气稍重一些null null 拓 展 一 null ought to的否定结构是 oughtnt to或 ought not tonull如null You oughtnt / ought not to leave in
2、 such a hurry. null 语 境 展 示 null null 观察null面图画，并试着归纳 mustnull have to的用法null null 自 null 归 纳 null null must null have to 都表示null必须null，但 must表示的是说话人的主观看法，而 have to 表示的是客观需要，有nullnull得nullnull的含义null null 拓 展 null null must的否定形式 must not / mustnt 表示nullnull应该，null可以，null准，禁止null在回答 must的问句时，否定式常用 ne
3、ed not / neednt或 dont have to 表示nullnull必nullnull如null You must not drive without a license. Its against the law. Must I eat here? No, you neednt. / No, you dont have to. null 语 境 展 示 null null 观察null面图画，并试着归纳null情态动词 +have donenull结构的用法null null 自 null 归 纳 null null should have done 表示null本应该做而实际nu
4、ll没做null，其否定形式 shouldnt have done表示null _nullnull neednt have done表示null过去null必做而实际null已null做了nullnull must have done 表示null过去一定做了nullnull null 拓 展 null null 1. could have done表示null过去本来能够做某null而实际null没有做nullnull如null He could have escaped, but he chose to stand and fight. 2. may / might have done表示
5、对已null发生过的情况的肯定推测，语气稍弱null might have done还可表示null本可能做某null而实际null没有做nullnull如null Jane didnt come on time. She may / might have missed the bus. He might have given you more help, but he was very busy then. null 即 学 即 练 null I. 选用方框内所给的情态动词填空null must; oughtnt to; dont have to; couldnt; mustnt; need
6、nt; cant; have to 1. You _ go on working because you look so tired now. 2. The weather turned out to be fine yesterday. I _ have taken the trouble to carry my umbrella with me. 3. Li Hua _ pass an examination before he can start work. 4. You _ come to the meeting if youre too busy. 5. You _ play now
7、! You shall finish your homework first! 6. I know things are hard with you, but you _ try to get over the difficulties. 7. I didnt see her at the meeting this morning; she _ have spoken at the meeting. 8. You _ imagine what difficulty we had walking home in the snowstorm. II. 根据汉语提示，将null列句子补充完整null
8、 1. We _ _ _ (本应该到达) at lunchtime but our flight was late. 2. Mark _ _ _ (本不需要着急). After running all the way, he arrived ten minutes early. 3. The teacher did not regret saying what he did but felt that he _ _ _ _ _ (本可以用不同的方式表达). III. 从括号内选择合适的内容完nullnull面对话null A husband (H) and wife (W) are drivi
9、ng to a party and are lost. W: Were lost. And we dont even have a map. You 1. _ (should take / should have taken) a map. H: I didnt think we were going to need one. I 2. _ (must have made / should have made) a wrong turn. W: Do we need to stop and ask for directions? H: No, we 3. _ (mustnt / dont ha
10、ve to). We 4. _ (can / must) use the cell phone and call the Allens and ask them how to get to their house. W: OK. H: Lets see. I thought I had the cell phone in my pocket. I 5. _ (cant / ought to) find it. I 6. _ (must leave / must have left) it at home. W: No, You didnt leave it at home. Ive got i
11、t here in my purse. Oh, no. It is out of power. We 7. _ (have to / may) look for a pay phone. Do you have any change? H: I just have dollar bills. W: You 8. _ (should have taken / must have taken) some change with you. H: Oh, its my fault. W: Watch out! You 9. _ (might have hit / must have hit) that
12、 car. H: I wasnt going to hit that car. I didnt come anywhere close to it. W: Anyway we 10. _ (ought to / can) be careful. 参 考 答 案 null 自 null 归 纳 null null本null应该做而实际null做了 null 即 学 即 练 null I. 1. oughtnt to 2. neednt 3. has to 4. neednt / dont have to 5. mustnt / oughtnt to 6. must 7. couldnt / cant 8. cant II. 1. should have arrived 2. neednt have hurried 3. could have expressed it differently III. 1. should have taken 2. must have made 3. dont have to 4. can 5. cant 6. must have left 7. have to 8. should have taken 9. might have hit 10. ought to
