根据引导宾语从句的不同连词，宾语从句可分为三类。1.由that引导的宾语从句。That只有语法作用，没有实在的意义，在口语和非正式文体中可以省略。例如：Hesaid(that)hewantedtostayathome.Shedidn’tknow(that)hewasbadlyill.Iamsure(that)hewillsucceed.2.由连接代词who,whom,whose,what,which和连接副词when,where,why,how引导的宾语从句。这些连接代词和连接副词在宾语从句中充当某个成分。例如：Doyouknowwho(whom)theyarewaitingfor?Heaskedwhosehandwritingwasthebest.CanyoutellmewheretheNo.3busstopis?don’tknowwhythetrainislate.3.由if或whether引导的宾语从句。If和whether在句中的意思是“是否”。例如：Iwanttoknowif(whether)helivesthere.Heaskedmewhether(if)Icouldhelphim.二.宾语从句的语序宾语从句的语序应为陈述句的语序。例如：Ihear(that)physicsisn’teasy.Ithink(that)youwilllikethisschoolsoon.CanyoutellmehowIcangettozoo?Pleasetellmewhenwe’llhavethemeeting.三.宾语从句的时态1.如果主句的时态是一般现在时，宾语从句该用什麽时态就用什麽时态。如：Idon’tthink(that)youareright.Pleasetelluswhereheis.CanyoutellmehowIcangettotherailwaystation?2.如果主句的时态是一般过去时，宾语从句只能用相应的过去时态（一般过去时，过去进行时，过去将来时，过去完成时）。例如：Heaskedwhattimeitwas.Hetoldmethathewaspreparingforthesportsmeet.HeaskedifyouhadwrittentoPeter.HesaidthathewouldgobacktotheU.S.soon.3.如果宾语从句所陈述的是客观真理，其时态常用一般现在时。例如：OurteachersaidthatJanuaryisthefirstmonthoftheyear.Scientistshaveprovedthattheearthturnsaroundthesun.(2004年北京市中考试题)MissGreendidn’ttellus_______in2002.A.wheredoessheliveB.WhereshelivesC.wheredidsheliveD.whereshelived2.(2004年上海市徐汇区中考试题)Wouldyoupleasetellme________?A.whendidhecomehomeB.wherehewouldplayfootballC.ifhehadseenthefilmD.whyhedidn’twatchthegame3.(2004年哈尔滨市中考试题)Idon’tknowwhen__________.A.willthetrainleaveB.thetrainwillleaveC.wouldthetrainleaveD.thetrainleave4.(2004年常州市中考试题)---Wedon’tknow_____________.---ItissaidthathewasborninSweden.A.whatheisB.ifheliveshereC.wherehecomesfromD.whichcountryishefrom1.Doyouknow_______duringthecomingsummerholiday?whatwillTomdoB.whatdidTomdoC.whatTomwilldoD.whatTomdid2.Iwanttoknow_________.whatishisnameB.what’shisnameC.thathisnameisD.whathisnameis3.Doyouknow________Icouldpasstheexam?A.thatB.whetherC.whatD.which1.李明说他对玩电脑游戏感兴趣。LiMingsays______________inter