Unit2情态动词人教版八年级英语上册

人教八上Unit2语法(情态动词can/could用法)讲义一、基本含义与语气（一）can“能；会；可以”，用于现在时态，语气比较直接、肯定。Canyouhelpmehangupthephotos?你能帮我挂照片吗？（二）could是can的过去式，也可用于现在时态，此时语气比can更委婉、客气，常用来表示请求。Couldyoupleasesweepthefloor?你能扫一下地吗？（用could使请求更礼貌。）二、核心用法——请求（Requests）与许可（Permission）（一）请求（R），用于向别人提出请求，希望对方做某事。结构：Can+主语+动词原形+其他？（语气较直接）你能帮我一下吗？Could+主语+动词原形+其他？（语气更委婉）你能帮我一下吗？problem...../Ofcourse./Noproblem....（否定）：Sorry,Ican't./I’dloveto,but...（二）许可（P），用于询问是否被允许做某事。结构：Can/Could+主语+动词原形+其他？我能去看电影吗？我能在午饭后和朋友们出去玩吗？回答（肯定）：Yes,youcan./Ofcourseyoucan.等；（否定）：No,youcan't./Sorry,youcan't,youhaveto...first..。三、用法辨析类别cancould时态用于现在时态。可用于过去时态；也可用于现在时态，表更委婉的请求。语气语气直接、肯定。语气委婉、客气。请求可用于请求，但不如could委婉。更常用于礼貌地提出请求。许可用于询问现在的许可。可用于询问现在的许可（语气委婉），也可用于过去的许可（表过去被允许做某事）。I.单项选择（15BCDBC610CBAAB1115CDBAC）()1.Couldyoupleasesweepthefloor?I'mbusycooking.A.Yes,sure.B.Sorry,Ican't.C.Yes,please.D.Thankyou.()2.youpleasetakethedogforawalk?OK,butIhavetofoldtheclothesfirst.A.MustB.ShouldC.CouldD.May()3.Couldyouplaytenniswhenyouwereatprimaryschool?Yes,IIstartedplayingtennisatseven.A.canB.shouldC.needD.could()4.Mum,canIgooutwithmyfriends?,butyouhavetoebackbefore10:00.A.Sorry,youcan'tB.Yes,youcanC.NowayD.You'dbetternot()5.—________youpleasehelpmecarrytheheavybox?—Sure.It’smypleasure.A.MustB.ShouldC.CouldD.Need6.—________youpleasehelpmecarrytheheavybox?—Sure.It’smypleasure.A.MustB.ShouldC.CouldD.Need7.—________Igotothecinemawithmyfriendstonight?—No,youcan’t.Youhavetofinishyourhomeworkfirst.A.MayB.CouldC.NeedD.Should8.—Couldyoupleasesweepthefloor?—Sorry,I________.Ihaveastomachacheandneedtorest.A.can’tB.couldn’tC.shouldn’tD.mustn’t9.Mysister________30minutestakingcareofherpetdogeveryday.A.spendsB.takesC.paysD.uses10.—________youhelpmecleanthemunitygardentomorrow?—Ofcourse.I’dloveto.A.MustB.CouldC.ShouldD.May11.—CouldIuseyourpen?Mineisbroken.—________.Hereyouare.A.I’msorryB.You’reweleC.SureD.No,youcan’t12.—________Ihangoutwithmyfriendsafterfinishingthechores?—Yes,youcan.A.NeedB.MustC.ShouldD.Could13.Mybrother________foldtheclotheswhenhewassixyearsold.A.canB.couldC.shouldD.must14.—Couldyoupleasehelpme________thephotosonthewall?—Noproblem.A.putupB.takeoffC.lookatD.thinkabout15.We________keepourhomecleanbydoingchoresregularly.A.needB.mustC.canD.should二、完形填空（1.B2.B3.C4.C5.B6.B7.B8.A9.B10.A）LastSaturday,ourclassjoinedamunityvolunteeractivity.Ourtaskwastocleantheparknearourneighborhood.At8a.m.,wemetattheparkgate.Ourteachersaid,“Everyone1._______ajob.You2._______choosewhatyouwanttodo,butyoumustfinishitcarefully.”Idecidedtopickuprubbish.Atfirst,Ithoughtitwaseasy.Butafter3._______foranhour,mybackhurt.Justthen,Lilycameoverandsaid,“4._______Ihelpyou?Wecanworktogether.”Iwasgladtoagree.Withherhelp,we5._______finishtheworkquickly.TomandPetercleanedthebenches.They6._______watertowipethedust.“Couldyoupassmethecloth?”TomaskedPeter.Theyworkedwellasateam.At11a.m.,alltheworkwasdone.Theparklookedmuch7._______.Anoldmanwalkedbyandsaid,“Youkidsaresohelpful!Thepark8._______socleannow.”Wefeltveryhappy.Ourteachertoldus,“Helpingothersisagoodwaytolearnresponsibility.You9._______alwaystrytodosomethingforthemunity.”Itwasatiringbutmeaningfulday.Ilearnedthatteamwork10._______makedifficultthingseasy.1.A.hasB.hadC.willhaveD.ishaving2.A.mustB.canC.shouldD.need3.A.workB.workedC.workingD.works4.A.MustB.ShouldC.CouldD.Need5.A.canB.couldC.shouldD.must6.A.useB.usedC.willuseD.areusing7