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Unit3LanguageinuseTolearntouseImperativestoexpressyourattitude语法讲解建议采用归纳法，如尽可能多的呈现一些相关例句，或可让学生从已学课文中找相应例句，引导学生试着从所观察到的语言现象中总结出语言规则和语法规律。在本模块中我们接触到了这些句子：Don’tstandtooclosetoNorthAmericans.Givethemmorepersonalspace.Becareful!Wavetosaygoodbye.课文中的这些句子叫作。祈使句用来表达叮嘱、劝告、希望、禁止、警告、请求或命令等。祈使句最常用来表达命令。Goandwashyourhands.快去洗手。（命令）Bequiet,please.请安静。（请求）Bekindtooursister.要对我们的妹妹友善。（劝告）Watchyoursteps.走路小心。（警告）Nolittering.不要乱扔垃圾。（禁止）Don’tforgettotakeanumbrella.不要忘了带雨伞。（叮嘱）请仔细观察以上祈使句，然后说出祈使句的特点：◇祈使句一般没有主语，说话的对象都是第二人称“你”或“你们”，所以也可以理解为省略了主语you。◇以动词原形开头，无时态和数的变化。◇祈使句的否定形式是在动词原形前加don’t。◇在表达请求时，可以加上please；表达比较强烈的语气时，可以用感叹号。Moreexamples:Pleaseclosethedoor.请把门关上。Sitdown,please.请坐。Cometomyoffice.到我办公室来。Stop!停！Hurryup!快点！Pleasedon’tdoit.请不要这么做。Don’tbelateagain.不要再迟到了。Don’tworry.Behappy.不要担心，高兴点儿。Don’tbringanyfoodordrinkintothelabnexttime.下次不要把任何食物或饮料带到实验室来。Don’tforgettoturnoffthelights.不要忘记关灯。课堂练习答案1Workinpairs.Talkaboutdo’sanddon’tsinaforeigncountry.BritainDo’s•Standinline.•Shakehands.•Say‘please’and‘thankyou’.•Opendoorsforothers.•Lookatpeoplewhenyoutalk.•Beontime.BritainDon’ts•Touchpeople.•Askawoman’sage.•Standtooclose.•Sayanythingtoopersonal.2Makealistofdo’sanddon’tstohelpvisitorstoBritain.•Standinline.•Don’ttouchpeoplewhenyoutalktothem.•…3Rewritethesentences.Eg.It’simportanttolistentotheteacher.Listentotheteacher.Youcannotshoutintheclassroom.Don’tshoutintheclassroom.1.It’simportanttobecareful.Becareful.2.It’simportanttocleanandtidythelab.Cleanandtidythelab.3.Youcannottouchanythingiftheteacherdoesn’taskyouto.Don’ttouchanythingiftheteacherdoesn’taskyouto.4.Youcannotbringfoodordrinkintothelab.Don’tbringfoodordrinkintothelab.5.Youcannotenterthelabalone.Don’tenterthelabalone.4Answerthequestions.Usethewordsandexpressionsfromtheboxtohelpyou.allright,arminarm,closedifferent,holdonto,kissthreetimespointat,shakehandswith,wave1.HowdotheBritishsayhellotoeachotherwhentheyfirstmeet?Theyshakehands.2.Doesbodylanguagemeanthesamethingindifferentcountries?No,itmeansdifferentthingsindifferentcountries.3.HowdotheRussianssayhellotoeachotherwhentheymeet?Theykissthreetimes.4.IsitpolitetostandclosetoNorthAmericans?No,itisnotpolitetostandclosetoNorthAmericans.5.IsitallrighttowavegoodbyeinGreece?No,itisnotallrighttowavegoodbyeinGreece.6.Howdoyouusuallysaygoodbyewithbodylanguage?Iusuallywave.课堂小测验IndividualactivityI.用括号内所给动词的恰当形式填空。1.It’sanimportantmeeting._________(not,be)late.2.___________(not,make)anynoise!Yourmotherissleeping.3.__________(not,speak)withyourmouthfulloffood.4._________(not,talk)and_______(read)aloud.Don’tbeDon’tmakeDon’tspeakDon’ttalkread5.___________(not,leave)yourhomeworkfortomorrow,Larry.6._______(look)out!Acariscoming.7._______(give)ustenyearsandjustseewhatourcountrywillbelike.8._________(not,let)thebabycry.Don’tleaveLookGiveDon’tletII.翻译下列各句。1.咱们一起玩吧！2.请不要迟到。3.回答这个问题。4.不要这么吵。Let’splaytogether.Don’tbelate,please.Answerthequestion.Don’tmakesuchanoise.5.上课安静。6.不要随处乱扔垃圾。7.不打架不骂人。8.有事请假。9.友好待人。Bequietinclass.Don’tthrowrubbisheverywhere.Don’tfightorsayrudewords.Askforleave.Befriendlytoclassmates.Writeeightshortimperativesinclass.Youcanusedo’sanddon’ts.