Conditional-sentences(香港朗文)

ConditionalsentencesWhendoweuseconditionalsentences?Wecanuseconditionalsentencestotalkaboutfacts.Conditionalsentenceshavetwoparts:anif-clause,andamainclause.Whenweuseconditionalsentencestotalkaboutfacts,weusethesimplepresentinboththeif-clauseandthemainclause.Wecanchangetheorderoftheclausesinaconditionalsentence.Doyoualwaysputacommabetweenthetwoclauses?Youputacommaiftheconditionalsentencestartswiththeif-clause.Youdon’tputacommaiftheconditionalsentencestartswiththemainclause.Ifyouheatwaterto100,itboils.℃Waterboilsifyouheatitto100.℃NoteInthistypeofconditionalsentence,wecanusewheninsteadofif.Whenwaterfreezes,itturnstoice.Whatarethefourtypesofconditionalsentences?UseIf-clauseMainclausetotalkaboutwhatwillpossiblyhappennoworinthefuturetotalkaboutfactstotalkaboutimaginarysituationstotalkaboutsomethingwhichcouldhavehappenedinthepastbutdidnotsimplepresenttenseIfitrains,simplepresenttenseIfyoudon’twateraplant,simplepasttenseIfIwereyou,pastperfecttenseIfIhadtakenataxi,simplefuturetensewewillstayathome.simplepresenttenseitdies.‘would’+bareinfinitiveIwouldbemorecareful.‘wouldhave’+pastparticipleIwouldhavearrivedontime.PracticeCompletethearticlebyformingconditionalsentences.Thegiraffeisthetallestanimalintheworld—amalegiraffecangrowuptosixmetrestall.HerearesomeotherinterestingfactsaboutthisanimalfromAfrica.stand/amothergiraffe/up—birth/give/sheborn/ababygiraffe/be—fall/it/nearlytwometreswhenshegivesbirth.Amothergiraffestandsupitfallsnearlytwometres.Whenababygiraffeisborn,stand/usually/giraffes—sleep/theyhave/agiraffe/star-shapedspots—from/definitely/it/SouthAfrica/comeifyouwanttofindoutwhichpartofAfricait’sfrom.agiraffe’sspots/you/study—tofindout/you/whichpartofAfrica/want/it’sfromYoustudyagiraffe’sspotspartofAfricait’sfrom.Ifagiraffehasstar-shapedspotsSouthAfrica.,Giraffesusuallystandwhentheysleep.ifyouwanttofindoutwhichitdefinitelycomesfromwhentheysleep.Theend