人教版八年级英语下册Unit4单元语法归纳与练习ppt课件

单元语法归纳与练习,情态动词should/could与until,although,sothat引导的状语从句,一、情态动词should与could1.情态动词should的用法should表示责任和义务、提出劝告等,意为“应该;应当”,可用于所有人称,其否定形式是在should后加not,可缩写为shouldnt。Youshouldwaitalittlelonger.你应该再多等一会儿。Youshouldnttalkwithhimlikethis.你不应该这样跟他说话。,2.情态动词could表建议的用法could可以用来提供建议,意为:“可以”。Whenwehaveproblemsinourlife,wecouldaskourparents,teachersorfriendsforhelp.生活中有困难时,我们可以向父母、老师或朋友求助。,二、until,although,sothat引导的状语从句1.untiluntil连词,意为“直到之时”,引导时间状语从句。在肯定句中必须与延续性的动词连用。not.until.表示否定,意思是“直到才”。Theydidntgotobeduntiltheworkwasfinished.他们直到完成工作才去睡觉。Untilyoutoldmeaboutit,Ihadknownnothing.直到你告诉我那件事,我才知道。,2.althoughalthough连词,意为“虽然,尽管”,引导让步状语从句,可以放在主句前面,也可以放在主句后面。Idontknowthemwellalthoughweareneighbors.尽管我们是邻居,但我不太了解他们。Althoughmysisterwasill,shewenttoschoolyesterday.虽然我姐姐病了,但是她昨天还是去上学了。3.sothatsothat意为“以便;为了”,常用来引导目的状语从句。IstudyhardsothatIcancatchupwithmyclassmates.我努力学习,以便赶上我的同学。Herunseverymorningsothathecankeephealthy.为了保持健康,他每天早晨跑步。,单项选择()1.MyfriendTomoftencopiesmyhomework.Althoughheisyourbestfriend,youstilltellhimthatiswrong.A.couldB.mightC.canD.should()2.Youwritehimalettertosayyouaresorryforit.Imnotgoodatwritingletters.Iwanttotalkaboutitthephone.A.could;onB.should;inC.can;atD.must;by,D,A,()3.Myparentsdontwantmetogooutonweekends.Youdbettertalkwiththem.Theresnoneedforyoutoarguewiththem!A.Whatswrong?B.Whocanhelpme?C.WhatshouldIdo?D.Wouldyouhelpme?()4.Whatamess!Thesharingbikesarethrowneverywhere.Letscollectandputthemintherightplacetheycanbeusedconveniently.(2018东营)A.unlessB.sothatC.becauseD.solongas,C,B,()5.Mr.SmithhaslearnedChineseforonlyhalfayear,hecanspeakitverywell.(2018贵港)A.ButB.SoC.AlthoughD.And()6.Excuseme,canyoutellmethewaytothenearestundergroundstation?Walkst