(
课件网) Unit 3 Language in use Module 4 可能性 建议 命令、禁止 可能性/ 许可 Modal verbs should be followed by the bare infinitives of other verbs. Now let’s read more examples. Read the following conversations and pay attention to the circled parts. Observe the following sentences carefully. And pay attention to the words in red. 1. You must be careful of falling stones. 2. You mustn’t walk too close to the edge of the hill path because you might fall and hurt yourselves. 3. You should always wear proper clothes. 4. Bears might think our rubbish is food. 5. — Can we go rock climbing — No, you can’t. Observe and discover 6. You mustn’t go off on your own. 7. You may need some water. 8. We should hang the food in a tree tonight. 9. They can smell food from a long way away. 10. No one can run faster in the forest than a bear. 11. You mustn’t make any sudden moves or make a sound. And above all, you mustn’t run. 1. You _____ be careful of falling stones. 2. You _____ (not) walk too close to the edge of the hill path because you _____ fall and hurt yourselves. 3. You _____ always wear proper clothes. 4. Bears _____ think our rubbish is food. 5. — _____ we go rock climbing — No, you _____(not). 6. You _____ (not) go off on your own. must mustn’t might should might Can can’t mustn’t go Ready 7. You _____ need some water. 8. We _____ hang the food in a tree tonight. 9. They _____ smell food from a long way away. 10. No one _____ run faster in the forest than a bear. 11. You _____ (not) make any sudden moves or make a sound. And above all, you _____ (not) run. may should can can mustn’t mustn’t Focus on 基本定义 情态动词本身有一定的意义，但不能独立作谓语，只能与其后的动词原形一起构成谓语，表示说话人的情绪、态度或语气，用来表达建议、请求、可能或意愿等。 情态动词没有人称和数的变化，后面必须跟动词原形。常见的情态动词有：can, could, may, might, must, need, shall, will, should, would。 You must be careful of falling stones. You mustn’t walk too close to the edge of the hill path because you might fall and hurt yourselves. 表示义务、命令或必要 意为“必须、应当”。 表示禁止、不允许。 1)军人必须服从命令。 Soldiers must obey orders． 2)你不许把这事告诉任何人。 You mustn’t tell it to anyone. You should always wear proper clothes. We should hang the food in a tree tonight. 表示建议或劝告，意为“应该”。 1)他应该更加努力。 He should work harder． 2)你应该跟你父母谈谈。 You should talk to your parents. You mustn’t walk too close to the edge of the hill path because you might fall and hurt yourselves. Bears might think our rubbish is food. 表示没有把握的推测，不表示时态，只是可能性比may小。 1)简可能在家。 Jane might be at home. 2)我可能会跟他说说。 I might talk to him. — Can we go rock climbing — No, you can’t. 表示许可或请求做某事，意为“可以”。 1)你现在可以开始工作了。 You can start your work now. 2)我明天可以晚到一会儿吗？我觉得不 大舒服。 Can I come a little later tomorrow I don’t feel ... ...
