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Unit4 Donteatinclass.第2课时 SectionAGrammarFocus—3c
一、祈使句1.含义祈使句是用来表示请求、命令或建议等的一种句型其主语一般为第二人称you,但通常省略祈使句的句末一般用句号,表示较强语气时用感叹号为了使祈使句显得更委婉、有礼貌,可在开头或结尾加上please2.祈使句的五种类型Do型祈使句实义动词原形+其他Listentome,please.请听我说Be型祈使句be动词+其他Bequiet,please.请安静Let型祈使句Let+sb.+动词原形+其他Letsplayfootball.让我们踢足球吧Please型祈使句Please+动词原形+其他Pleasestandup.请起立Pleasedontstandup.请不要起立No型祈使句No+v.-ing/名词!表示禁止Nosmoking!禁止吸烟!Nophotos!禁止拍照!
3.祈使句的否定形式通常是在谓语动词前加dont但要注意以let开头的祈使句,其否定形式是“Dont+let+宾语+动词原形+其他.”或“Let+宾语+not+动词原形+其他”4.对祈使句的基本回答1A TomtaketheboxtoMr.Wusoffice.B肯定回答——YesIwill.否定回答——SorryIcantcarryit.2A Dontlistentomusicinclass.B NoIwont.用于自己之前没做过,同时也表明自己今后也不会做时或SorryIwontdoitinfuture.用于自己犯错,被别人禁止时3A Letsgooutforawalk.“Letsdosth.”常用于提出建议B肯定回答——Thatsagoodidea.或Thatsoundsgood.直接表示赞同否定回答——Ohno.Itstoohot.或Ohno.LetswatchTVathome.可用“No”作否定回答,并适当解释或提出自己的见解祈使句一般要对方去做的动作是在将来发生肯定回答时常用“YesIwill”;否定回答时常用“NoIwont”等will为“将要”之意,wont为will和not的缩写形式,为“将不;将不会”之意
二、情态动词can与haveto1.can能;会1表示做某事的能力,其否定式为cant如CanyouspeakEnglish你会讲英语吗?2表示“允许;许可”如Youcankeepthebookforaweek.这本书你可以借一周2.haveto必须;不得不其后接动词原形haveto有第三人称单数形式,即hasto,变疑问句和否定句时要借用助动词do/does如Wehavetogohomeafterschool.我们放学后必须回家Ⅰ.用括号内所给单词的适当形式填空1.__Dont__play__notplaywithfire火.2.Dont__run__runintheclassroom.3.Lethim__not__play__notplaytheputergames.4.Canwe__eat__eathere5.Doyouhaveto__go__gotobedbeforetenatnightⅡ.根据汉语意思完成句子,每空一词1.到这儿来__e____here__.2.别在走廊里跑__Dont____run__inthehallways.3.快点!__Be____quick__!4.不要在这儿吃东西__Dont____eat__here.5.让我们骑自行车到那儿吧__Lets____ride__thebiketogetthere.Ⅲ.按要求完成下列句子,每空一词1.Lilycanplaytheguitar.改为一般疑问句并作否定回答—__Can__Lily__play__theguitar—Noshe__cant__.2.Jackhastoplaythepianoeveryweekend.改为一般疑问句__Does__Jack__have____to__playthepianoeveryweekend3.Bequick.改为否定句__Dont____be__quick.4.Youcanteatfoodinclass.改为祈使句__Dont____eat__foodinclass.5.Youcantbelateforclassnexttime.改为祈使句__Dont____be__lateforclassnexttime.Ⅳ.单项选择C
1.________listentomusicintheclassroom.A.NotB.NoC.DontD.DoesntA
2.Tom,please________theclassroomnow.A.cleanB.tocleanC.cleansD.cleaningA
3.Lets________ontimeforclasses.A.beB.benotC.areD.isB
4.Shehasto________herhomeworkeverynight.A.doesB.doC.doingD.didA
5.Sorry,you________playbasketballintheclassroom.A.cantB.dontC.donthavetoD.doesntⅤ.选词填空阅读短文,从方框中选择适当的词并用其正确形式填空,使短文通顺、意思完整每词限用一次 fight dirty dish rule beforefollow outside keep one practiceDearSam,Herearesome__1__foryouwhenyourdadandIarenotathome.__2__,gethomeearly.Dontplay__3__afterschool.Second,takecareof照顾yourbrotheranddont__4__withhim.Thirdhelpyourgrandmadothe__5__afterdinner.Fourth,rememberto__6__thepianoforonehoureveryevening.Fifth,gotobed__7__10oclock.Thelastone__8__yourroomcleananddontleaveyour__9__clotheseverywhere.YourdadandIwillbeveryhappyifyoucan__10__therules.1.__rules__
2.__First__
3.__outside__4.__fight__
5.__dishes__
6.__practice__7.__before__
8.__keep__
9.__dirty__10.__follow__。