Unit 4 Section A(Grammar Focus-3c) 课件2022-2023学年人教版七年级下册英语

Don’t eat in class. Unit 4 不要上课吃东西。 Section A(Grammar Focus-3c) 祈使句是表示请求、命令、建议、劝告、警告等的句子。通常省略主语you。句末可以用感叹号或句号。 祈使句 e.g. Spell it, please. Stand up. Let's play basketball. (请求) (命令) (建议) 一、祈使句的肯定式。 1. “Do 型”: 以动词原形开头。 e.g. Come here. 到这儿来。 Stand up. 起立 2. “Be 型” : 以be动词开头。 e.g. Be quiet, please. 请安静。 Be careful. 请小心。 3.“Let 型”: 以Let开头。 e.g. Let’s go! 咱们走吧! 注意： 有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。 e.g. Go this way, please. 请这边走。 二、祈使句的否定式。 1. Do型和Be型，都是在句首加don’t。 e.g. Don’t sit here. 不要坐在这儿。 Don’t be late. 别迟到。 2. 以let开头的祈使句。 直接在句首加don’t e.g. Don’t let him go. 不要让他走。 =Let him not go. Don't let me clean the room. 不要让我打扫房间。 =Let me not clean the room. 3. No+名词/动名词(v.ing) 表示禁止或规劝，常用于公共场所。 e.g. No photos! 禁止拍照！ No smoking！       禁止吸烟！ No talking! 禁止说话！ 把下列祈使句改成否定形式。 1. Be on time. 2. Eat in the hall. _____________________ _____________________ 3. Talk loudly. _____________________ Don’t be on time. Don’t eat in the hall. Don’t talk loudly. Exercise Don’t run in the hallways. Don’t fight. What are the rules? Can we eat in the classroom? We must be on time for class. No, we can’t, but we can eat in the dining hall. Grammar Focus Can we wear a hat in class? Does he have to wear a uniform at school? What do you have to do? Yes, we can./ No, we can’t. Yes, he does./ No, he doesn’t. We have to be quiet in the library. Grammar Focus 1. 不要在走廊里跑。 Don't in the . 2. 不要打架。 _______________ 3. 有什么规则？ __________________________ 4. 我们必须按时上课。 We must for class. run hallways. Don’t fight. What are the rules? be on time 5. 我们可以在教室里吃东西吗？ Can we