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1、介词（prep.）一、介词按其构成可分为：1•简单介词：at,in,on,to,since,until等。Hefsworkedtheresince1998.2.复合介词:into,onto,outof等。Sheisoutofschool.3.二重介庁司:fromunder,frombehind,fromoutof,untilafter,exceptin等。Tmfromoutoftown.4.短语介词:becauseof,insteadof,inspiteof等。Eg:Iwentbacknotbecauseoftherain,butbecauseIwastired・二
2、、介词的作用：1.表示地点：after,along,at,below,by,of,near,over,through,under等。Eg:Nearthevillagetheboysareskatingontheice.Theylaydownundertheshadeofatree.2.表示时间：about,after,across,at,during,for,in,of,till,until等。Eg:Afterclasshewilltellusabouttheaccident.Theaccidenthappenedduringthenight.3.表示动作：at,a
3、cross,around,on,over,under等。Eg:Theearthgoesaroundthesun.Thecarisunderrepair.4.表示比较：as,like,above,over,with等。如：Eg:Shewassomethinglikehersister.ChineseismuchmoredifficultincontrastwithEnglish.5.表示原因：about,for,from,with等。Eg:Don'tworryaboutmylessons.Businesskeptmefromcoming.Hewasangrywithw
4、hatIdid.6.表示条件：to,with,without等。Eg:Withoutyouradvice,hewouldhavefailed.7.表示手段.方式：as,by,in,with等。Eg:Hebehavedasadrunkard.Learnthenewwordsbyheart.Weseewithoureyes・&表示距离、数量：from,in,within等。Eg:Myhouseistenmilesfromtheschool.Theywerethirtyinall.9.表示目的：as,for等。Eg:Ionlysaiditasajoke・It'stimef
5、orclass.10.表示让步：for,with等。Eg:Forallhiseffort,hedidn'tsucceed.Withallhismoney,heisunhappy・囲：for还可以弓丨导插入语：I,forone,shallvoteagainsttheproposal.三、介词的用法：1.与形容词搭配的词组有：beafraidof（怕）beangrywith（生某人的气）beawayfrom（不在某地）belatefor（迟到）bedifferentfrom（与不同）begoodat（善于）begood/badfor（对有益/有害）beintereste
6、din（对感兴趣）be/getreadyfor（为作好准备）besureof（对有把握)beworriedabout(为感到扌旦忧)1.介词后常用人称代词宾格和动词-ing形式2.几组易混淆的介词①关于时间前介词的具体使用，如下：1)介词"on”表示在具体的某一天，某一天的上午、下午或晚上,或对某_天或某_天的上午、下午、晩上进行详细的描述：onMondayafternoononMondayonthatdayonasunnydayinNovemberonSundayonMay1stOnNewYear'sDayonweekendsonthemorningofthefi
7、fteenthonawarmday2)“in”表时间段，即指在较长的一段时间内,相当于during年份：in(theyear)2012季节：inspiing/summer/autumn/winler月份：inAugustinAugust2012上下午：inthemorning/afternoon/evening其他：inthewinterholiday(s);inthedaytime“in+—段时间”用于将来时(w订1+do),用howsoon提问"in/overthepast+—段时间”，常用于现在完成时(havedone)"since+过去时间点”，常用于现
