Unit 4 Don't eat in class. SectionA grammar focus重点词句2023--2024学年人教版英语七年级下册

Unit 4 Don't eat in class.重点词句 Grammar focus 一. 祈使句 祈使句一般用来表示请求、命令、劝说、号召、警告等。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句尾加上please。句末please时，前面通常加逗号。 祈使句歌诀 祈使句，祈使句，请求、命令或建议。 主语是______常省去，_________开头记。 否定形式要注意，______放到句首去。 要讲客气用______，句首、句末没关系。 No doing! 需提起，表示________不小觑。 1. 肯定祈使句的形式 类型 结构 例句 Do 型 动词原形（+宾语）+其他. 吃东西在餐厅。__________________________ Be 型 Be+表语（形容词）+其他. 请保持安静。__________________________ Let 型 Let+宾语+动词原形+其他. 让我来帮你。__________________________ 2. 否定祈使句的形式 类型 结构 例句 Do 型 在句首加________ 不要忘记我！__________________________ Be 型 不要迟到！__________________________ Let 型 Don’t +let++宾语+动词原形+其他. 别让他走。__________________________ __________________________ Let +宾语+not+动词原形+其他. No 型 No +名词/doing! 禁止垂钓！ 练习： 1.Don't ________(think) too much. 2.Tom________(play) basketball with your brother. 3.Tom, ________(play) basketball with your brother. 4. __________(not run) in the classroom please. 5._____(be) careful. 6.No __________(sing). 7.No_______(food). 8. Please________(get) up early. 9. You must drink milk every day. （改为祈使句） ________ ________every day. 10.You can't talk in class. （改为祈使句） ________ ________in class. 11.Play sports in street next time. ________ ________ __________ in street next time. 二. must和have to 同：都可以表示“必须” 异：1. must 表示主观的意愿，have to强调客观的必要性，意为“不得不” Teacher, I must go home now. （周六放学回家） Mom, I have to go to school now. （周天返校） 2.must 没有人称和数的变化，而have to有人称和数的变化 I / He / She / They must work every day. I / We / They /You have to work every day. I / We / They /You _______ ________ to work every day. （改为否定句） ________ I/you/they _______ to work every day? He / She / Bob has to work every day. He / She / Bob _______ ________ to work every day. （改为否定句） ________he/she/Bob ________ to work every day? 3.两者的否定形式大不相同 mustn't表示“禁止，不准” don't have to表示“不必” You mustn't swim in the river. （你不准在河里游泳） You don't have to get up early. （你不必早起） 【注意】在回答must引起的问句时，如果是否定的答复，可用don't have to或needn't （不必），但不能用mustn't （一定不，必须不，不允许，不 得）。 --Must I finish my homework