人教精通版五年级英语下册-名师教学课件-祈使句.pptx

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1、 Unit 3 We should obey the rules.祈使句祈使句 Be quiet.Ask and answer questions actively.help old people take good care of young childrenkeep off the grass Dont make noise.Dont eat in class.Read and observe(观察)!Dont make noise!Dont eat in class!请求，命令，建议请求，命令，建议省略主语省略主语youyou肯定句肯定句否定句否定句祈使句Draw the conclus

2、ion(得出结论得出结论)祈使句祈使句 :是表示请求、命令、建议，叮嘱等是表示请求、命令、建议，叮嘱等句子，只用一般现在时。通常说话的对象是句子，只用一般现在时。通常说话的对象是第二人称第二人称you,you常被省略常被省略。肯定结构:(Positive forms)1.Do型 e.g:Please turn left!turn left!.=Turn left!Turn left!,please.2.Be型 e.g Be a good boy!3.Let型e.g Let chant.Let sing a song.否定结构:(Negative forms)1.Do型和Be型的否定式都是在句首

3、加dont构成。Dont be late for school!Dont make noise.Dont eat in class.2.Let型的否定式有两种:“Dont+let+宾语+动词原形+其它成分”“Let+宾语+not+动词原形+其它成分”。e.g Dont let him go.Let him not go.。3.有些可用no开头,用来表示禁止性的祈使句。No+n/doing+其他成分e.g No smoking!No fishing!Dont be late for school.Im late.What do you want to say to him?你想对他说什么？Wha

4、t do you want to say to them?你想对他们说什么？Dont make noise.Be quiet！安静的噪音Tom is a good boy.Hand in his homework on time.按时交12Dont play football here!13Dont smoke!No smoking!14Dont pick the flowers!Wear masks,please!Wash your hands,please!祈使句祈使句,无主语,只用动词就可以.表示请求或命令,加上please表客气。如果变成否定句，Dont开头是规律。Summary:Thank you for listening