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1、祈使句Imperativesentence祈使句的概述祈使句是用来表示请求，命令，劝告，建议等的句子。祈使句习惯上常常省略主语，句末用感叹号或是句号，朗读时常用降调。祈使句的形式1.祈使句的肯定式2.祈使句的否定式3.祈使句的let式4.祈使句的强调式5.不含动词的祈使句祈使句的肯定式在祈使句的肯定式中，谓语动词要使用原型。Lookattheblackboard.Sitdownplease!Openthedoorplease!Keepawayfromit!祈使句肯定式练习连词成句1.TV,ple
2、ase,watch_____________________________________2.please,clean,desks,chairs,and,the____________________________________3.apples,me,give,some____________________________________PleasewatchTV.Pleasecleanthedesksandthechairs.Givemesomeapples.祈使句的否定式祈使句的否定
3、式中，谓语动词用don’t/never+动词原形Don’tworry.Nevermind.Don’tturnoffthelight!Don’tplayfootballontheroad.祈使句否定式练习将下列祈使句变为否定式。1.Givemesomeapples.2.Openthewindow,please.3.Bequiet.4.PleasewatchTV.5.Runaroundtheplayground.祈使句的let式以let引导的祈使句，常用与一、三人称，结构为：Let+人称代词（宾格）
4、+动词原形Letmesee.Letmecheck.Let’sgototheseaside.Let’sgohome.祈使句的let式练习下面的句子是祈使句吗？如果是请填Y不是请填N.1.Sitdown,please.()2.Youshoulddoyourhomeworkcarefully.()3.Letmehavealook!()4.Let’sgotothepark!()5.Don’tleavemealone.()YNYYY祈使句的强调式动词前加do，表示强调。Dostudyhardatschoo
5、l.在学校一定要努力学习。Docomehereontime.务必要准时来到这里。Dofinishyourhomework.一定要完成你的作业。Dobequick.一定要快一点。不含动词的祈使句由一个单词、词组或是短语组成的祈使句。Quick!Nosmoking!Nodrinking!Notalking!不含动词的祈使句练习给下列标志选择适当的英文标语Noparking.Nosmoking.Nofishing.Nodrinking.Nophotos.Noswimming.一、用括号内所给动词的适当
6、形式填空。1.__________(not,be)late.2.____________(dust)thedressingtable.3.____________(not,speak)withyourmouthfulloffood.4.____________(not,talk)and____________(read)abook.5.____________(not,drop)thenicevase,Sam.6.____________(look)out!Acariscoming.7.____
7、________(give)ustenyearsandjustseewhatourcountrywillbelike.8.____________(not,let)thebabycry.9.Openthewindowand____________(shut)thedoor.10.Let’s____________(sweep)thefloor.祈使句练习题Don'tbeDustDon'tspeakDon'ttalkreadDon'tdropLookGiveDon'tletshutsweep二、将
8、以下祈使句改为否定式1.Comehereearly.2.Askhim.3.Pleasewaitforher.4.Readthebookcarefully.5.Situnderthetree,please.6.Let’sgotheretogether.祈使句练习题Don'tcomehereearly.Don'taskhim.Pleasedon'twaitforher.Don'treadthebookcarefully.Don'tsitunderthetree,please.Let'snotgoth
