Unit 7Teenagers should be allowed to choose their own clothes重点语法精讲课件 人教版英语九年级

Teenagersshouldbeallowedtochoosetheirownclothes重点语法精讲Unit7CONTENTS情态动词被动语态01情态动词表义务02表达同意和不同意的常考点03情态动词被动语态Tablescanbemadeofstones.桌子可由石头制造。肯定句结构：情态动词+be+过去分词Ibelievethatsomethingcannotbeboughtbymoney.我相信有些东西是用钱买不到的。否定句结构：情态动词+not+be+过去分词情态动词被动语态Cantablesbemadeofstones?桌子能用石头制造吗？一般疑问句结构：情态动词+主语+be+过去分词+...?Theseyoungtreesshouldbewateredeveryday.（对划线部分提问）特殊疑问句结构：疑问词+情态动词（+主语）+be+及物动词的过去分词（+by+宾语）？Howoftenshouldtheseyoungtreesbewatered?情态动词被动语态的练习1.选词填空。Tomakeourcitymorebeautiful,rubbish______intothewater.(mustn'tbethrown/mustn'tthrow)2.按要求改写句子。Everyonecanhearthewonderfulspeechinthehall.（改为被动语态）Thewonderfulspeechcan____________byeveryoneinthehall.4.按要求改写句子。Peopleshouldtakegoodcareoftheagedeverywhere.（改为被动语态）Theagedshould____________goodcare______everywhere.3.按要求改写句子。Weoughttokeeptheroomclean.（改为被动语态）Theroom__________________keptclean.mustn'tbethrownbeheardoughttobebetakenof情态动词表义务（must/mustn’t/should/shouldn’t/oughtto/oughtnotto)Allpassengersmustwearseatbelts.所有乘客必须系安全带。1.must可表义务，常表示“必须”。-Mustwewearseatbelts?我们必须系安全带吗？-Yes,youmust.是的，必须。-No,youneedn't./No,youdon'thaveto.不，不必。2.关于must的简短回答：否定回答时不用mustn't。而needn’t/don’thavetoWemustn'tbuyfurproducts.我们不应当购买皮草制品。3.mustn't也可表义务，表示“禁止”，也可意译为“不应当；不许”。情态动词表义务（must/mustn’t/should/shouldn’t/oughtto/oughtnotto)

Youshould/oughttoapologizetohim.Youshouldnot(=shouldn’t)driveafterdrinking.Yououghtnottodriveafterdrinking.should为情态动词，意为“应该；应当”，后接动词原形，无人称和数的变化，常可与oughtto互换。可用于表达义务或责任，否定形式shouldn't（shouldnot），常可与oughtn'tto（oughtnotto）互换，意为“不应当；不应该”。情态动词表义务（must/mustn’t/should/shouldn’t/oughtto/oughtnotto)

1.选择适当的单词填空。We______

driveafterdrinkingwine.(must/mustn't)mustn't2.选词填空。They______

treattheirmotherinthisdisrespectful(不尊重的)way.(should/shouldn't)shouldn't3.根据句子意思填入恰当的情态动词。Bylaw,seatbelts______

bewornbyallpassengers.must/should4.根据中文意思补全句子。你的穿着应该整洁漂亮，而且必须非常合身。Whatyouwear______

bestylishandclean,and______

definitelyfitwell.shouldmust表达同意和不同意的常考点ShallwegotoLondonforthesummerhoilday?

.It’soneofthemostbeautifulcities.A.SoundsgreatB.Idon’tlikeitC.YouarekiddingD.You’rewelcomeA表达个人观点，我们可以用以下句式或短语：1.I(don’t)think/suppose/believe/hope...2.inmyopinion/mind/view3.Personally,Ithink…表达赞同:表达同意和不同意的常考点

I’dliketoinviteyoutomybirthdaypartytonight,MrLee.

.A.Ohno,Let’snot.B.I’mverysorry,butIhaveotherplans.C.I’dratherstayathome.D.Ohno,That’llbetoomuchtroubleB表达不赞同:表达同意和不同意的常考点

1.翻译句子。-Jane，你今天下午能和我一起去游泳吗？-是的，我很乐意去，但是我得先做家务。-Couldyougoswimmingwithmethisafternoon,Jane?-Yes,__________________,butIhavetodothehouseworkfirst.I’dlike/loveto2.完成句子。-Smith教授的课非常有意思。-我非常同意。-Prof.Smith'slectureisreallyinteresti