初中英语人教版七年级下册have to和must的区别.pptx

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1、haveto和must的区别初一英语董方平学习目标1.学习haveto和must的区别。一、haveto必须；不得不1、强调客观上的必要性,有人称、时态和数的变化，后接动词原形，其否定形式don'thaveto.(1)It'srainingoutside.wehavetostayintheroom.(2)Wedon'thavetocometoschooleveryday.2、hasto为haveto的三单形式.其后也接动词原形，其否定形式为doesn'thaveto.(1)Shehastokeepquietinthelibr

2、ary.(2)Bobdoesn'thavetoplaythepianotoday.观察例句：1、Tomhastoplaytheguitareveryday.2、Youdon'thavetotellmeaboutthat.Idon'tcare.3、Doesshehavetokeepquietinthelibrary?Yes,shedoes./No,shedoesn't.通过观察以上句子可以得出have/hasto的句型结构。肯定句：否定句：主语+have/hasto+动词原形+其他.主语+don't/doesn'thaveto

3、+动词原形+其他..一般疑问句：：Do/Does+主语+haveto+动词原形+其他?Yes,主+do/does.No,主+don't/doesn't.二、must的用法:1、强调说话者的主观意愿，没有人称、时态和数的变化，其后接动词原形。其否定形式为mustn't意为“禁止”。eg:Youmustn'tbelateforschool.2、以must开头的一般疑问句，其否定答语有两种情况：（1）No,...needn't.'不,...不必.'(2)No,...don't/doesn'thaveto.eg：MustIgonow

4、?No,youneedn't./No,youdon'thaveto.课堂练习1.It'ssnowingoutside.we___stayintheroom.A.mustB.needC.canD.haveto2.MustIdothehomeworktoday?No,you_____.A.havetoB.mustn'tC.don'thaveto3.Wehaveto_____(穿)sportsshoesforP.E.classes.4.MustIdothehomeworktoday?No,you_________.A.haveto

5、B.mustn'tC.don'thavetoD.can'twear5.Therearelotsof____thatstudentshavetofollowinschool.A.exercisesB.problemsC.skillsD.rules知识总结1.have/hasto与must的区别Thankyouforlistening