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1、RevisionAdverbialClauseofCondition条件状语从句1IfyouarehappyIfyouarehappyandyouknowitclapyourhandsIfyouarehappyandyouknowitclapyourhandsIfyouarehappyandyouknowitneverbeafraidtoshowitIfyouarehappyandyouknowitclapyourhandsIfyouarehappyandyouknowitstompyourfeet.Ifyouarehappyandy
2、ouknowitstompyourfeet.IfyouarehappyandyouknowitneverbeafraidtoshowitIfyouarehappyandyouknowitstompyourfeetIfyouarehappyandyouknowitwinkyoureyeIfyouarehappyandyouknowitwinkyoureyeIfyouarehappyandyouknowitneverbeafraidtoshowitIfyouarehappyandyouknowitwinkyoureye2Ifyouareh
3、appy,whatwillyoudo?IfIamhappy,Iwillsmile.3Ifyoubecomesad,whatwillyoudo?IfIbecomesad,Iwillcry.4Sheisdoingherhomework.Ifyouarehard-working,youwillgetgoodgrades.Shegetsgoodgrades.5Ifyouplaycomputergamesonweekdays,you’llbeverytiredinclassyourparentswillbesad.youwon’tgetgood
4、grades.youreyeswillbepoor6Shewillbelate.Ifshe_____toschool,she________late.Sheisgoingtowalktoschool.walkswillbeLead-in7位置：从句可放在主句之前或之后，但是放在主句之前须有逗号隔开eg:如果我有足够的钱，我就去环游世界If引导条件状语从句定义：if“如果,假如”它引导的句子表示某事发生所需的条件，即“在…条件下，某事才能发生”，在句子中充当状语，因此称之为条件状语从句。（If引导的条件状语从句表示假如有从句的动作发生，
5、就会有主句动作的发生）IfIhaveenoughmoney,Iwilltravelaroundtheworld=IwilltravelaroundtheworldifIhaveenoughmoney8If条件句：条件句用于陈述语气，表示假设的情况可能发生，其中if是“如果”的意思。主句一般将来时，从句用一般现在时。构 成条件从句主 句时 态If＋一般现在时主语＋shall/will+动词原形例 句Ifhecomes,hewilltakeustothezoo.9用法：1.如果主句是一般将来时，从句则用一般现在时。Ifitrain
6、s（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.如果主句含有must,may,can等情态动词，从句也要用一般现在时。Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.Ifyoufinishthehomework，youcangohome．如果你作业做完了就可以回家了。Ifyouwanttoloseweightyoumust/shouldeatlessbread.如果你
7、想减肥，你必须少吃面包。103.如果主句是祈使句，从句同样要用一般现在时。Don’tgoandplayfootballifyoudon’tfinishyourhomework.PleasecallmeifhecomesnextSunday.111.如果主句是一般将来时，从句则用一般现在时。Ifitrains（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.如果主句含有must,may,can等情态动词，从句也要用一般现在时。Ifyoudrivetoofast
8、,youmayhaveanaccident.Youmuststopifthetrafficisred.3.如果主句是祈使句，从句同样要用一般现在时。Don’tgoandplayfootballifyoudon’tfini
