介词介词又叫前置词,是一种虚词,介词不能单独作句子成分,必须与它后面的名词或代词(或相当于名词的其他词类、短语或从句)构成介词短语,才能在句子中充当一个成分。介词的分类:一简单介词:是由一个单词构成的介词。(1)普通介词:如at,by,for,from,in,of,on,to,with等。(2)合成介词:如onto,into,within等。(3)分词介词:如including,during,following,considering,regarding,speaking,judging,talking等。贰二重介词:是由两个简单介词连用而构成的介词。如frombehind,sincebefore,untilafter等。叁短语介词:是由两个或两个以上的词所组成的短语构成的介词。一般来说,这个短语最后一个词是简单介词。如infrontof,becauseof,insteadof,outof,apartform,bymeansof等。2010高考真题1.(重庆)ThedictionaryiswhatIwant,butIdon’thaveEnoughmoney____me.A.byB.forC.inD.with2.(四川)Tired,Jimwasfastasleepwithhisback__abigtree.A.inB.belowC.besideD.against3.(湖北)Itisillegalforapublicofficialtoaskpeopleforgiftsormoney____favorstothem.A.inpreferencetoB.inexchangeforC.inplaceofD.inagreementwith4.(江西)Nowadays,somehospitalsrefertopatients___name,notcasenumber.A.ofB.asC.byD.with5.(北京)Wouldyoumindnotpickingtheflowersinthegarden?Theyare___everyone’senjoyment.A.InB.atC.forD.toDDBCC