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1、零时态条件句Weusethezeroconditionalwhentheresultofaconditionisalwaystrue.Thetimeisnotimportantbecauseitisalwaysafact表示客观真理，理所当然的事情Thestructureisif+presentsimple+presentsimple从句一般现在。主句一般现在lfyouheatice，itmelts第一时态条件句Weusethefirstconditionaltoshowaresultofaconditionthatispossibleinthefuture表示未来可能的结果Thestr
2、uctureis:if+presentsimple+will+baseverb从句一般现在。主句一般将来ifitsnows,lwillgosnowboarding第二时态条件句Weusethesecondconditionaltoshowaprobableresultofaconditioninthefuture.Unlikethefirstconditional,thefutureconditionisnotareapossibility.对现在情况和将来情况的虚拟Thestructureisif+pastsimple+would+baseverb从句一般过去。主句would+动词原形
3、Ifiwonamilliondollars,Iwouldtravelaroundtheworld第三时态条件句Weusethethirdconditionaltorefertoapastconditionthatdidnothappenoranimpossiblepastcondition对过去情况的虚拟Thestructureisif+pastperfect+wouldhave+pastparticiple从句过去完成。主句would+have+donelfyouhadphonedyesterday,Iwouldhaveaskedyououttolunchtoday练习Practice
4、:ZeroconditionalWhichsentencebelowisafact(F)Whichisahabit(FO）Ifyouboilwater,itturnsintosteam._'IfImissthebus,Iusuallywalk._'Ifourteacherisprincipal,theschooldirectorteachesus.-lfyoueattoomuchfastfood,yourhealthwillsuffer._lfyoumixblueandred,yougetpurple._练习Fillinthespaceswithaconditionaltense(zer
5、o,firstorsecond).Add0,1or2Ifi_______illTomorrow,i____stayathome._Ifi_______amilliondollars,I___buyaboatandsailaroundtheworldIfyou_____onyourbirthday,you______havesevenyears'badluck.Ifyou_________metopainttheroom,i______makeyouaspeciallunch.People_______weight,ifthey______moreexercise.Ifi_______up
6、early,I_________theearlytrain._Completeeachsentenceusingaconditionaltense(zero,firstorsecond)Ifyougavemethemoney,___________________________IfIseeher,_________________________Ifyoucouldliveanywhereintheworld_________________________Ifyouhavetimenextweekend,___________________________Ifwegettoomuc
7、hhomework,_________________________IfIfinishworkearlytoday,______________________动名词三种形式第一个在介词的后面，第二个充当主语，第三个在特殊动词后面如likeenjoy，promise，miss，admit等词后面做宾语。选出下面的动名词，并指出做那些成分。Theyarealwaystalkingaboutmovingtoanewlocation.W
