人教版九年级英语全册Unit7Teenagersshouldbeallowedtochoosetheirownclothes.GrammarWriting.ppt

Unit7Teenagersshouldbeallowedtochoosetheirownclothes.,Grammarmight(可以)must(必须),should(应该),will;would(愿意)haveto(必须；不得不),hadbetter(最好),Grammar,1.含情态动词should的被动语态结构式：should+be+及物动词的过去分词。(1)肯定句结构为：主语+shouldbe+及物动词的过去分词+(by+宾语)。eg:你应该自己完成作业。Yourhomeworkshouldbefinishedbyyourself.,含情态动词should的被动语态,(2)否定结构为：主语+should+not+be+及物动词的过去分词+(by+宾语)。eg：不应该允许青少年晚上外出。Teenagersshouldnotbeallowedtogooutatnight.(3)特殊疑问句结构为:疑问词+一般疑问句？eg：应该允许学生们做什么？Whatshouldstudentsbeallowedtodo?,(4)一般疑问句结构为:Should+主语+be+及物动词的过去分词+(by+宾语)？回答:Yes，主语+should./No，主语+shouldnt.eg:这些小树应该每天浇水吗？Shouldtheseyoungtreesbewateredeveryday?Yes,theyshould./No,theyshouldnt.对，应该。/不，不应该。,主动句变被动句的步骤与其它情况相同。,WeshouldallowteenagerstowatchTVonSunday.,TeenagersshouldbeallowedtowatchTVonSunday(byus).,Peoplemaycatchfishintheriver.,Fishmaybecaughtintheriver(bypeople).,1.Icanfinishthework.Theworkcanbefinishedbyme.一般问句：Cantheworkbefinishedbyyou?,2.Weshouldplantmanymoretrees.,Manymoretreesshouldbeplantedbyus.,一般问句：Shouldmanymoretreesbeplantedbyus?,Practice,Teenagersshouldbeallowedtodrivethecar.,3.Parentsshouldallowteenagerstodrivethecar.,一般问句：Shouldteenagersbeallowedtodrivethecar?,Treesmustbewateredeveryday.,4.Theymustwatertreeseveryday.,一般问句：Musttreesbewateredeveryday?,Sixteen-year-oldsshouldbeallowedtodrive.(改为否定句),Sixteen-year-oldsshouldntbeallowedtodrive.,Ithinktheworkshouldbedoneatonce.(改为否定句),Idontthinktheworkshouldbedoneatonce.,1.Theflowers_often.A.mustbewaterB.mustbewateredC.mustwateredD.mustwater2.Thebooksmay_fortwoweeks.A.bekeptB.beborrowedC.keepD.borrow,3Thebrokenbike_herebyMrSmith.A.canmendB.canmendedC.canbemendD.canbemended4.Youngtreesshould_everyyear.A.beplantedB.plantedC.plantD.areplanted,Writing,本单元写作针对某人、某事或某活动制定规则或提建议。写此类短文时，最重要的是掌握情态动词的用法以及相关句型。再根据所给的提示、要求等明确中心内容，就能写出一篇好文章来。,常用句型归纳如下：1.Wemust/can;2.Wemustnt/cant;3.Weshould/shouldnt;4.Weshould/shouldntbeallowedto;5.Youdbetter;6.Whynot,假设你叫大明，你的一个美国笔友托尼将到中国来并在你们班学习。请写信告诉他你们班的班规，80词左右。,写作注意点,1.语态、时态要准确无误。2.主谓语要一致，主语的人称和数要和谓语一致。3.注意人称代词的宾格形式。4.注意冠词用法。5.注意拼写、标点符号和大小写。标点符号特别注意汉英的不同。,注意语法、句法知识的灵活运用。,DearTony，Iamgladtoknowthatyouwillcometoourclass.Youaskedmeabouttheruleshere.Letmetellyousome.Westartclassat8oclockinthemorning.Youshouldbeintheclassroombeforethat.Whentheclassbegins，youshouldsitsilentlyonyourseat.Youmustntspeaktoanyoneelsewhentheteacherisgivingthelesson.,samplewriting,Ifyouwanttoanswertheteachersquestion，putyourhandsupfirst.Whentheteachercallsyourname，youcanstandupandanswe