条件状语从句(unless).(精品PPT8)

条件状语从句：Unless3.口诀:___________条件状语从句：If2.if从句用___________，主句用__________，用来描述将来的情况。主将从现1.如果他努力学习，他将会通过考试。Ifhe_______hard,he________theexam.一般将来时一般现在时studieswillpass①3.口诀:___________条件状语从句：If2.if从句用___________，主句也用__________，表示客观事实或习惯。主现从现1.如果我把玻璃杯扔掉，它就会摔碎。IfI_______aglass,it________.一般现在时一般现在时dropbreaks②Unless如果不，除非条件状语从句:unless从句遵循if从句主将从现和主现从现的情况。要领:unless=if…notPartC:Page9C2:Matchthehalf-sentencesinColumnAwiththecorrectonesinColumnB.1.如果明天不下雨，我们就去远足。Ifit__________________,wewillgohiking.=Wewillgohiking__________________2.如果你不把肉存放在冰箱里，它就会变坏。Ifyou__________________inthefridge,it_________.=_______________________inthefridge,it_________.Unless=If…notunlessitrainstomorrow.doesn’traintomorrowdon’tkeepthemeatUnlessyoukeepthemeatgoesbadgoesbadUnless=If…not3.除非天下雨，他通常是走路去上学。Heusually_____________onfootifit___________.=_____________,heusually_____________onfoot.4.如果你现在不走，你就赶不上火车了。Ifyou________________,you_________thetrain.=___________________,you_________thetrain.goestoschooldon’tleavenowUnlessitrainsgoestoschoolUnlessyouleavenowwon’tcatchwon’tcatchdoesn’trainSummary条件状语从句:if从句unless从句主将从现主现从现时态口诀:将来客观事实习惯