(
课件网) Being a good learner Unit 4 Grammar（情态动词） Learning objectives In this lesson, we will be able to: Tell the subtle differences between “should” and “must” when it comes to obligation, and use the correct modal verb according to the context. In role-playing activities simulating real-life situations like shopping, at the library, or asking for help, students will respond appropriately using the target modal verbs. Write letters to friends or family, using modal verbs to ask for permission or give suggestions. Grammar can may should must 情态动词可以表示说话人的语气或某种情态，也可以表示推测。本单元我们学到的表示推测的情态动词有can, may,should和must。 1. can ①表示_____，意为_____ 否定：_____ 疑问句：把_____ 可以，能够 能力 cannot / can’t can 放主语前面 情态动词: can 1. The mouse can always run away from the cat. 2. I can swim. 3. She cannot (can’t) speak French. 4. —Can he catch the mouse —Yes, he can. / No, he can’t. 1. He likes playing football, but he _____ play it well. 2. Leo is good at painting, so he _____ paint very well. 3. Both Hi and Lo _____ dance beautifully. 4. Lo _____ drive a car, and he thinks it is difficult. 5. He ____ swim well, but he _____ play the guitar. can’t can can can’t can’t Complete the sentences with can or can’t. can 可能；也许 1.may,表示推测“可能性”时，意为“可能；也许”。 He may be an Englishman. 他可能是英国人。 2. may表推测时，可以用于否定句，意为“可能不、也许不”，但不用于疑问句。 He may not be at home. 他也许不在家。 may 能力提升 _____ I use your pen I left mine at home. 2.It’s cloudy outside. It _____ rain later. 3.You _____ find it interesting if you read this book. 4.—_____ I ask you a question —Yes, of course. 5.He _____ come to see us tomorrow, but he isn’t sure. May may may May may 情态动词: must must 表示_____, 意为_____ must not / mustn’t _____ 对must的否定回答_____ I must run fast, or he may catch me! We students must finish our homework by ourselves. You mustn’t play with fire. —Must we fight with each other —Yes, we must. — No, we needn’t. 必要性 必须 禁止，不可以 needn’t 不必 You _____ play football in the street. It’s dangerous. 2.We _____ follow the traffic rules when we cross the road. 3.Students _____ be late for school. 4.You _____ hand in your homework on time. 用 must 或 mustn’t 填空 mustn’t must mustn’t must 情态动词: should 4. should 表示_____, 意为_____ shouldn’t/should not _____ 态度 应该 不应该 1.What should I do 2.If you want to improve your English, you should read more English books. 3.It’s cold outside. You should wear a warm coat. 4.You shouldn’t make noise in the hospital. 1.You _____ eat more vegetables. They are good for your health. 2.We _____ waste water. It’s precious. 3.Students _____ listen carefully in class. 4.You _____ play computer games all day. It’s bad for your eyes. 用 should 或 shouldn’t 填空 should shouldn’t should shouldn’t Group work Work with your partne ... ...
