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1、介词、意思是“用”的几个词介词有三个：in,with,by，在句首或句末作状语。1. in+language(English,Chinese,French,Japanese等),WhatsthisinEnglish?InEnglish,itsanorange.2. with+具体的工具(pen,pencil,knife等)，单数名词前要加冠词。Iwanttowritewithapencil,andIdontlikewritewithapen.Chinesepeopleeatfoodwithchopsticks,butwesternpeopleliketoeatfoodwithknivesand
2、forks.3. by+抽象的工具(e-mail,force,phone等)表方式或手段，名词前不用冠词;by+动名词或动名词短语(通过，靠，以)；by+交通工具(car,bus,bike)Sendthisletterbye-mail.Shelivesbysellingfruit.Mymothermakeslivingbyteaching.动词有一个：use;usesthtodosthChinesepeopleusechopstickstoeatfood.Weuseaknifetocut.二、in的用法1. in+月份、年份；on+日子/星期/某个不确定的具体日子inMarch,in2014,
3、inmarch2014onApril1,onMonday,onarainyday此外：inthemorning/afternoon/evening/night;inspring/summer/autumn/winteratnoon/night/midnightat8oclock2. in+时间段(threedays,aweek等)在之后，句子用将来时After+时间段(threedays,aweek等)在.之后，句子用过去时;after+时间点，句子用将来时Myfatherwillbebackinaweek.Myfathercamebackafteraweek.Iwillplaybasketb
4、allafterschool.Hewillbebackafterthreeoclock.3. in+颜色+服装，意思是：穿着什么颜色的服装Thegirlisinaredskirt.Wehavegreensweatersinwhiteandred.4. in+地点，在里面；intheeast/west/south/northof在东、西、南、北，一地在某个地的范围内inthehouse;inthesky;intheeastKunmingisinthenorthofYunnan.三、with的用法1作“用”讲，见上文。2. 做“和”讲，常用于句末。and是连词，连接两个名词。Iwenttothez
5、oowithmyparentslastweek.MyparentsandIwenttothezoolastweek.3. 作“有”讲，在名词后面作后置定语。Idliketobuyahousewithagarden.Thegirlwithlonghairisverybeautiful.反义词：without“没有”Idliketogowithoutyou.Thehousewithoutagardenischeaper.Sheleftwithoutsayinggoodbye.4. “随着区别：with是介词，with+名词+名词/介词短语/现在分词（称为独立主格结构）as是连词+句子Withtim
6、egoingby,Ilearnmoreandmoreknowledge.Withnolightoutside,itfeltlikemidnight.Withahardjobinacrayonfactory,hedoesntfindmuchtimetovisithishometown.Itwashardtohavefunwithaseriousstormhappeningoutside.Astimegoesby,Ilearnmoreandmoreknowledge.5. 其它用法IsthatOkwithyou?那样你行吗？四、on的用法1. 在上面（正上方，物体有接触）Abookisonthed
7、esk.2. 关于（详细论述的）；about关于（范范谈及）Thescientistplannedtowriteabookonenvironmentalpollution.Theteacheraskedstudentstowriteanarticleaboutfriendship.Forhomework,ourteachertoldustowriteaboutourvacation.3. on+具体的时间on+日子/星期/某个不确定的具体日子onApril1,onMonday,onarainyday,onTeachersDay4. onabike=bybike,骑车，作状语rideabike骑
8、车，作谓语Ialwaysgotoschoolbybike.=Ialwaysgotoschoolonabike.=Ialwaysrideabiketogotoschool.5. ontheeast/west/south/northof在东、西、南、北，两地接壤YunnanisonthesouthofSichuan.intheeast/west/south/northof在东、西、南、北，一地在某个地的范围内KunmingisinthenorthofYunnan.五、for的用法1. “给”Hereisaletterforyou.Allthesepresentsareforyou.Ihavesom
9、ethingsforthekids.2. “对于”“对而言”，至于Forgirls,wehaveskirtsinpurpleforonly$20.Forhomework，ourteachertoldustowriteaboutourvacation.ForthousandsoftouristsfromChina，thissmallislandinSoutheastAsiaisawonderfulandsafeplacetotakeaholiday.Itis+adj./n.+forsb.todosth.对某人来说做.（是）./某人做.（是）ItisnoteasyformetolearnEngli
10、sh.Itsveryimportantforhimtoattendthemeeting.Itis+adj.+ofsb.todosth.=sb.be+adj+todosth.Youareclevertodolikethis.=Itiscleverofyoutodolikethis.Itskindofyoutohelpme.3. for+句子“因为”Today,wearehappy,forwearehavingasportmeeting.4. for+时间段Ididmyhomeworkforthreehourslastnight.5. for+breakfast,lunch,dinner,supp
11、er（三餐）Ieatnoodlesforbreakfasteveryday.6. for+价格“要价”Wehaveblackshoesforonly$28.Socksareonly$2forthreedollars.6.“为了”Writeanadforyourownclothesstore.Canyoubuyacakeforme?Ineedapairofblackshoesforschool.IwanttobuyabagforschoolWehavesomeinterestingandfunthingsforyouthisterm.Comeandseeforyourselfatourcloth
12、esstore.亲自Writequestionsfortheanswers.7. for+breakfast/lunch/dinner（super）Ioftenhavenoodlesforbreakfast.Thatsforsure当然forfunThankyoufor六、atatschoolatgreatsale大减价onsalehavealookat七、as1. Asayoungboy,heusedtocausealotoftroubleforhisparents.2. Ashegotbetter,hefeltgoodabouthimself.3. Asitbecomescold,thel
13、eavesonthetreefallsoff.其它后面常常会接动名词的介词：to,at,before,after,besides,of,through,by、选择题1. Dearteacher,thankyouforEnglishsowell.A.teachourB.teachusC.teachingourD.teachingus2. Weusuallygoswimmingweekends.A.forB.onC.aboutD.with3. CanyouhelpmemyEnglish?A.atB.onC.withD.to4. Thereisorangeandtwobananasthetable.
14、A.a,onB.an,onC.a,underD.an,to5. Pleasecallme954-3526.A.inB.atC.ofD.on6. Afterclass,Ihavegymnasticstwohours.A.onB.atC.forD.in7. WedonthaveclassesSaturdaysandSundays.A.inB.onC.atD.from8. Mymusicclassfinishes4:00p.m.A.inB.onC.atD.for9. Wellbuythishousealowprice.A.withB.aboutC.atD.for10. theold,wehavebl
15、ackandbrowncoatsforonly$20.A.FromB.OnC.InD.For11. Maryabagschool.A.need,toB.need,forC.needs,toD.needs,for12. Thegirlredismysister.A.inB.onC.ofD.over13. Iwasborn.A.inOct.8,1969B.in1969,Oct.8C.onOct.8,1969D.on1969,Oct.814. Theygotoschoolarainymorning.A.inB.onC.atD.for15. OurschooltripisMay.A.inB.onC.atD.to二、填空题（一）用适当的介词填空1.Healwaysplaygamesus.2. HewasborntheafternoonoflastSunday.3. Shegoeshomefiveeveryday.4. Hebeganwritingarticles1842.5. Everyday,Icanplaycomputergamesanhour
