江苏省沭阳县银河学校七年级英语下册《Unit 6 Pets Grammar》课件 牛津版

GrammarUnit 6 Pets祈使句是表示请求、给予命令或指祈使句是表示请求、给予命令或指示的句子，它的主语是示的句子，它的主语是you（听话（听话者），通常省略；把后面的谓语动者），通常省略；把后面的谓语动词置于句首，并且谓语动词一律用词置于句首，并且谓语动词一律用原形。原形。一、祈使句（一、祈使句（Imperative sentence）1) 祈使句的肯定形式祈使句的肯定形式各种动词原形各种动词原形 + 宾语宾语/表语表语/不加。如：不加。如： Stand up, please. Pass it to me. Be quiet. Be polite! / Dont be rude! Look out, please. 2) 祈使句的否定形式祈使句的否定形式Do not / Dont + 谓语动词原形，如：谓语动词原形，如： Dont open the door, please.Dont sit down. Please dont be late again. please可放句首或句尾，不影响动可放句首或句尾，不影响动 词和整句话。词和整句话。温馨提示温馨提示 表示禁止时，尤其是标语等也可表示禁止时，尤其是标语等也可用用“No + 名词名词 动词动词-ing”来表示。来表示。如：如： No photos. 禁止拍照。禁止拍照。 No smoking! 禁止吸烟！禁止吸烟！ No parking! 禁止停车！禁止停车！二、情态动词二、情态动词should和和mustshould和和must作为情态动词，都可作为情态动词，都可表表“建议建议”，但是表示的程度不同。，但是表示的程度不同。1) should用来表示用来表示“劝告劝告”或或“建议建议”，意为意为“应当；应该应当；应该”，其否定形式为，其否定形式为 should not 或或shouldnt，语气比较委婉。，语气比较委婉。如：如：He should visit Mr Green. 他应该拜访格林先生。他应该拜访格林先生。We should put on warm clothes on such cold days. 在这样的冷天我们应该穿暖和的衣服。在这样的冷天我们应该穿暖和的衣服。He should not / shouldnt go to school late. 他不应该上学迟到。他不应该上学迟到。You should not / shouldnt wash dresses made of silk in hot water. 你不该在热水里洗丝绸做的衣服。你不该在热水里洗丝绸做的衣服。2) must用来表示坚定的建议，意为用来表示坚定的建议，意为“必必须，一定须，一定”，其否定形式为，其否定形式为must not 或或 mustnt，表示，表示“不可以不可以”“”“不许不许”。如：。如：You must eat breakfast on time every day. 你必须每天按时吃早饭。你必须每天按时吃早饭。 Wilson must hand in his paper tomorrow. 威尔逊明天必须交论文。威尔逊明天必须交论文。Doctors say you must not / mustnt eat too much sweet. 医生说你一定不能吃太多的糖果。医生说你一定不能吃太多的糖果。 You mustnt smoke here. 你不可以在这里吸烟。你不可以在这里吸烟。 1. Dont play games on the street. You _ play games on the street.2. It is good to give seats to the elderly on the bus. You _ give seats to the elderly on the bus.3. Its wrong to play a trick on others. You _ play a trick on others.PracticeI.写出下列各句的同义句，每空词数不限。写出下列各句的同义句，每空词数不限。should notshouldshould not4. It is good to water young trees every day. You _ water young trees every day.5. Keep the door closed, please. _ the door, please. 6. Please keep the bowls clean today. Please _ the bowls today.7. He doesnt know how he should do it. He doesnt know how _ it.shouldClose / Dont opencleanto do8. His dog barks when it hears the telephone ring. His dog barks when the telephone _.9. Walk the dog at 6.30 a.m. _ the dog _ at 6.30 a.m.10. I cant go out with you because I have to look after my mother. I cant go out with you because I have to _ my mother.ringsfor a walktake care ofTakeII. 连词成句。连词成句。1. clean, twice, the, week, cage, must, we, a _?2. should, take, of, your, care, pet, you, good_.3. must, too, not, give, your, much, money, child, you_.Must we clean the cage twice a weekYou should take good care of your petYou must not give your child too much money4. brush, every, fur, should, day, Suzy, her, cats_?5. the, frighten, not, girl, do, little_.6. day, every, English, her, teach_.7. feed, beside, his, table, dog, the, should, Jim_?Should Suzy brush her cats fur every dayDo not frighten the little girlTeach her English every dayShould Jim feed his dog beside the table8. your, look, you, must, pet, after, well_.9. too, to, important, night, eat, not, it, late, is, at_.10. your, bring, pet, not, school, to, must, you_.You must look after your pet wellIt is important not to eat too late at nightYou must not bring your pet to school