鲁教版英语六下Unit 6《Don’t eat in class》（Section A）ppt课件2.ppt

Unit 6 Don’t eat in class. Section A (Grammar Focus-3c) Ⅰ. 选句子配图 A. Don’t talk. B. Don’t eat food and drink. C. Don’t take photos. D. Don’t drink. 答案：1~4. CABD Ⅱ. 句型展示 1. ——她必须在图书室里保持安静吗？ ——是的。 —______ she ______ ______ ______ quiet in the library? —Yes, she ______. 答案：Does; have to be; does 2. ——我们能在走廊里听音乐吗？ ——不，不能。 —______ we ______ ______ music in the hallways? —No, you______. 3. 我们不必天天来上学。 We ______ ______ ______ come to school every day. 答案：2. Can; listen to; can’t 3. don’t have to have to 必须；不得不 ◆Does he have to wear a uniform at school? 在学校里他必须穿校服吗？ ◆He has to help his mother cook dinner. 他得帮他妈妈做晚饭。 ◆He doesn’t have to clean the room. 他不必打扫房间。 【探究总结】 have to的用法 (1)have to为情态动词，意为“必须，不得不”。第三人称单数为 has to，过去时为had to, 将来时为will have to。 (2)否定形式和疑问形式要借助do, does, did 等助动词来完成， 其否定形式为don’t/doesn’t/didn’t have to, 其疑问形式为：Do/Does/Did. . . have to. . . ? (3)have to的同义词为 must，但两者用法不同。 ①have to强调客观需要。有人称和时态的变化。 ②must 强调主观看法； mustn’t 意为“禁止”。无人称和数的变化，且只能用在一般现在时中。 【学以致用】 ①他今天得去看望他爷爷。 He ______ ______ visit his grandfather today. ②今天你不必穿校服。 You ______ ______ ______ wear your school uniform today. 答案：①has to ②don’t have to Ⅰ. 选词填空 quiet, eat, can’t, uniform, late 1. Don’t______anything in class. 2. Don’t talk loudly in the library. Please be______. 3. Don’t get up______on weekdays. 答案：1. eat 2. quiet 3. late 4. We______listen to music in the classroom but we can listen to it in the music room. 5. As a student, you have to wear your school______. 答案：4. can’t 5. uniform Ⅱ. 句型转换 1. I have to get up early. (改为一般疑问句) ______ you ______ ______ get up early? 2. He has to go shopping with his mother. (改为否定句) He ______ ______ ______ go shopping with his mother. 答案：1. Do; have to 2. doesn’t have to 3. We can wear our own clothes. (改为一般疑问句，并作否定回答) —______ we ______ our own clothes? —No, you ______. 答案：Can; wear; can’t