语法(五)—介词Ⅰ,介词的相关概念和用法:1,介词的概念:介词是一种用来表示词与词、词与句之间的关系的虚词,起“媒介”作用。2,介词后加宾语,即名词或代词性质的词。例如:Iaminschool.inthemorning例如:Thanksforhelpingme.Whataboutgoingforawalk?3,介词的分类:①,时间介词;②,地点介词;③,方式介词;④,目的介词;⑤,原因介词;⑥,运动方向介词;⑦,比较介词;等等等等。Ⅱ,介词的分类:一、表示时间的介词——常考的时间介词有at,in,on“在……”1.at表示“在某一时间点”,或用来表示不确定的时间和短期的假日、时节等。如:atsixo’clock,atEaster2.in表示“在某一时间段”,如用在月、季、年份、时代、世纪等。如:inJuly/summer/2000/ancienttimes/the1999’sinthemorning/afternoon/evening3.on表示在特殊或具体的日子。如:onSaturday,onSaturdaymorning,onthemorningofAugust1st,onMid-autumnDay4.注意:当表示时间的名词前,有this/last/next/every时,前面不需要加介词。【小练习】:Therearefourseasons_________ayear.Whatdoyouwear_________winter?Wehavenoclasses_________Sundays.Mybirthdayis_________September.Mybirthdayis_________June18th.(()1Childrengetgifts____Christmasand____theirbirthdays.A.on;onB.at;onC.in;inD.in;on()2-Thereisnothing____tomorrowafternoon,isthere?-No.Wecanhaveagameoftabletennis.A.onB.inC.outD.up()3Alotofstudentsinourschoolwereborn____March,1981.A.inB.atC.onD.since()4Timsuddenlyreturned____arainynight.A.onB.atC.inD.during()5Mygrandfatherwasborn____Oct.10,1935.A.onB.inC.atD.of()6Thetrainisstarting___fiveminutes.A.inB.atC.forD.still()7Mikedoeshisexercises____seven_____theevening.A.on;toB.at;inC.by;ofD.at;on()8Shewillcomeback_______nextweek.A.inB.atC.onD./()9Theyplayedbasketball_______lastnight.A.inB.atC.onD./4.since,from,和for(拔高部分)1)since指从某时一直延续至今,后接时间点,主句用完成时。如:Hehaslivedheresince1993.2)from说明开始的时间,谓语可用过去、现在、将来的某种时态。如:Fromnowon,IwilllearnEnglishinthemorning.3)for指动作延续贯穿整个过程,后接时间段,表示“持续……时间”。主句用完成时。如:IhavestudiedEnglishforsixyears.5.after与in“在……之后”1)after与时间段连用,用于过去时。如:Theyfinishedtheworkaftertwoyears.2)after与时间点连用,用语将来时。如:I’llringyouupaftertwoo’clock.3)in与时间段连用,指“在……之内”,表示从说话起的一段时间内,常用将来时。如:Thebuswillbehereintenminutes.6.by“到…以前为止”(拔高部分)“by+时间点”表示“到…以前为止”,如果by后跟一个过去的时间点应用过去完成时。如:Wehadlearned1000Englishwordsbytheendoflastterm.7.“during+时间段”“在……期间”(拔高部分)与延续性动词连用表示某期间的动作。如:Heliveswithusduringtheseyears.8.until用于否定句中,意为“直到…才”,其前的谓语动词多用瞬间性动词;用于肯定句中,意为“直到…为止”,其前的谓语动词须用延续性动词。如:Ididn’tleaveuntilmymothercamehome.Iwaitedformymotheruntilshecamehome.9.before和after表示时间,分别意为“在…之前”和“在…之后”。如:Pleasebringyourhomeworkbeforeteno’clock.【小练习】:练习1:()1Theteacheriscomingback___anhour.A.afterB.forC.inD.before()2Shelivedinthemountainvillage____theyears1940-1950.A.betweenB.duringC.inD.since()3MissWangwillcometoBeijing____twodays.A.afterB.inC.onD.before()4TheAmericanCivilWarlastedfouryearsbeforetheNorthwon____theend.A.byB.atC.inD.on练习2:()1Maryhadfinishedherhomework____thetimeIgothome.A.untilB.byC.atD.when()2Westayedatthelab___ourteacherreturned.A.tillB.byC.duringD.while()3Theydidn‘tleavethestation___theygetonthetrain.A.untilB.byC.afteryD.at练习3:(拔高题)1()BothMaryandBettywillgetmarriedthisyear.MaryisgoingtobegintheirhoneymoonChristmaswhileBetty_____NewYear’sDay.A.on;onB.at;inC.at;onD.by;on2()Sufferingfromtheterribleearthquake,thevictimsoftenawakeseveraltimes_____thenightandsometimestheyevencannotsleep_____night.A.in;atB.at;inC.during;inD.in;during3()Hewentabroadforfurthereducation_____afewweeks.Hewillgoabroadforfurthereducation_____afewweeks.A.in;inB.after;afterC.in;afterD.after;in4()Nohurry!Thetrainwillbehere________afewminutes.Nohurry!Thetrainwillbehere__________twelveo’clock.Nohurry!Thetrainwillbehere__________lunch.A.after;in;atB.in;after;afterC.after;in;afterD.in;after;in5()ThehorribleearthquakestruckWenchuan_____theafternoonwhenIwastravellingthere.A.inB.onC.duringD.within6()LastnightMr.Crookdidn’tcomebackattheusualtime.Instead,hemetsomefriendsand_____out_____midnight.Itwas_____midnightthattheyreachedthecampsite.A.stayed;until;notuntilB.stayed;until;untilC.didn’tstay;until;untilD.didn’tstay;until;notuntil练习4:()1Childrenwakeupveryearly____themorningofChristmasDay.A.inB.onC.forD.at()2____acoldwintermorning,Imetherinthestfeet.A.InB.OnC.AtD.For()3Ithappenedtobeverycold____themorningofoursportsmeet.A.atB.onC.withD.of()4Whydidyougetupsoearly___thismorning.A.onB./C.atD.in练习5:()1HewenttoShanghai___September3,1991andcameback___acoldmorninglastyear.A.in;onB.on;inC.on;onD.in;ia()2Lucywasborn____thenightofMay12,1984.....A.onB.inC.atD.to()3MrsBrowncametoChina____1996.A.onB.ofC.to,D.in()4___themorningofNovember20,1915,theworkerscametoChicagotoshowtheirmourning___JoeHill.A.On;toB.In;of.C.On;for,D.At;for()5Annmoved___Hangzhou___September,1992.A./;iniB.to;inC.to;onD,in;in()6Theystartedoff___anautumnafternoon.A.duringB.atC.inD.on练习6:()1Heoftengoes____school____sixthirty____themorning.A.for;to;inB.to;atinC.to;for;atD,for;at;to()2Hearrived___Shanghai___9:30___March5.fA.at;in;atB.to;on;atC.in;on;atD.in;at;on()3TheEnglishteachertoldmetogetthere____halfpastten.A:inB.atC.onD.of()4Thechildrengetup___6o‘clock.A.atB.onC.duringD.in