Unit2NoRulesNoOrderSectionA3a-3d（课件）-人教版英语七年级下册

Unit2NoRulesNoOrder3a-3d学习目标01通过观察和阅读，能够总结祈使句和含有情态动词的句子中的动词的形态变化特点。020304通过讨论，能够归纳和掌握祈使句的句式结构，意义和用法。。通过小组合作，能够正确使用祈使句和情态动词谈论学习和生活中的规则。通过对情态动词的分辨，能够根据语境，正确使用情态动词can、must、haveto。Whatschoolrulesdoyouhave?LeadinWeartheschooluniform.Don’tuseyourphoneinclass.Don’tlitter.Keepyourschoolcleanandtidy.Bepoliteandtreateveryonewithrespect.Putupyourhandifyouwanttoaskyourteacheraquestion.SchoolRulesWalkinthehallway.Don’t

run!Don’tlitter!Youmustn’t/can’tlitter!SchoolRulesBepoliteandtreat

oneanotherwithrespect.Walkinthehallway.Don’trun!Bepoliteandtreatoneanotherwithrespect.Don’tlitter./Youmustn’tlitter./Youcan’tlitter.Canwebringourphonestoclass?No,wecan’t.Wemustkeeptheminourlockers.Canweeatsnacksinclass?No,wecan’teatinclass.Wehavetoeatinthedininghall.Readthesentences.Dotheverbsinboldneedtochangeforms?Why?3aImperativeSentencesWalkinthehallway.Bepoliteandtreatone

anotherwithrespect.Don’trun!Don’tlitter.祈使句ImperativeSentences祈使句Pleasegivemeahand.（请求）用于表达_________、_________、_________等语气的句子。定义Comeinandwashyourhands.（命令）Bekindtoyourbrother.（建议）例句祈使句命令请求建议ImperativeSentences1通常省略主语，以动词原形为开头祈使句2为了让祈使句听起来比较客气、委婉，可在句首或句末加上please3祈使句的否定一般在句首加don't或者No+动词ing特点ImperativeSentencesDo型祈使句祈使句ImperativeSentencesClosethewindow.肯定句___________+宾语（+其他）.Don’tclosethewindow.否定句________+动词原形（+其他）.动词原形Don’tBe型祈使句祈使句ImperativeSentencesBecareful.肯定句_____+形容词/名词短语（+其他）.Don’tbelateforclass.否定句________+形容词/名词短语（+其他）.BeDon’tbeLet型祈使句祈使句ImperativeSentencesLethimcomein.肯定句Let+宾语+_________（+其他）.Don’tlethimcomein.否定句________+宾语+_________（+其他）.Don’tlet动词原形动词原形Let型祈使句祈使句ImperativeSentencesDon'tlethergo.否定句_______+let+宾语（+其他）.Don’tLethernotgo.Let+宾语+_______+动词原形（+其他）.notNo型祈使句祈使句ImperativeSentencesNosmoking.No+_______/n.（通常表示“禁止……”，用于指示牌、布告等doingNoswimminginthelake.Walkinthehallway.Don’trun!Bepoliteandtreatoneanotherwithrespect.Don’tlitter./Youmustn’tlitter./Youcan’tlitter.Canwebringourphonestoclass?No,wecan’t.Wemustkeeptheminourlockers.Canweeatsnacksinclass?No,wecan’teatinclass.Wehavetoeatinthedininghall.Readthesentences.Dotheverbsinboldneedtochangeforms?Why?3a1情态动词没有除了haveto之外，其余没有人称和数的变化2情态动词后跟动词原形3情态动词不能单独作谓语，必须和系动词或实义动词连用.常见的情态动词有can、may、must、haveto、should、would等。特点情态动词ModalVerbsModalVerbs情态动词1.Wemustrespectourfriends.2.Wehavetowearuniformsatschool.must表达说话者主观的看法、信念或强烈的建议，常用于表达个人的决心、义务感或内在的驱动力。haveto强调由于外部的客观情况、规定、事实等因素，导致不得不做某事，并非完全出于个人意愿。例句Standup.Sitdown.Takeaseat.Openyourbook.Raiseyourhands.Clapyourhands.Useyourpen.Isay,youdo.GameTimeLookattheblackboard概念祈使句一般用来表示示______、______、______、_____、_____、________等。ImperativeSentence（祈使句）1祝愿TurnofftheTV,please.请求建议劝说禁止Goandwashyourhands.Let'splaybasketball.Bepolitetoyourclassmates.Haveagoodday!Nosmoking!注意事项:有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。e.g.Gothisway,please.请这边走。命令Walk

inthehallway.Don’trun！Bepoliteandtreatoneanotherwithrespect.Don'tlitter./Youmustn'tlitter./Youcan'tlitter.Canwebringourphonestoclass?No,wecan't.Wemustkeeptheminourlockers.Canweeatsnacksinclass?No,wecan'teatinclass.Wehavetoeatinthedininghall.No,theydon’t.Becausetheverbsappearinimperativesentences（祈使句）oraftermodalverbs（情态动词）.Dotheverbsinboldneedtochangeforms?Why?3aNoclimbing.Nosmoking.Nopets.Nonoise.Read,observe,andtry.•Donoteatordrink.•Noeatingordrinking.•Youcan’t/mustn’teatordrink.No+doing.3cWritetherulesfortheothersigns.•Donotparkhere.•Noparking(here).•Youcan’t/mustn’tpark(here).•Donottakephotos.•Nophotos.•Youcan’t/mustn’ttakephotos.3cThankyou！3cWritetherulesfortheothersigns.•Donotswim.•Noswimming.•Youcan’t/mustn’tswim.•Donotfeedthebirds.•Nofeed