条件状语从句

单击此处编辑母版文本样式,第二级,第三级,第四级,Page,*,单击此处编辑母版标题样式,条件状语从句,引导词：,if/unless,条件状语从句遵循：,“主将从现”,eg:,If it rains tomorrow,I shant(wont)climb the hills.,I shant(wont)climb the hills,if it rains tomorrow.,主句：,I shant(wont)climb the hills.,从句：,If it rains tomorrow.,主句是,祈使句,或有,情态动词,，从句也用一般现在时,eg:,Please call me,if he comes next Sunday.,Can you call the policeman,if you are in trouble?,if的含义,“如果，假如”（条件状语从句）,eg:If you work,hard,you will,pass the exam.,是否”=whether (宾语从句）,eg:I dont know if it will rain tomorrow.,unless“除非.”“非.不可”,注意：unless从句里的谓语只能是肯定式，因为本身unless表示否定。,eg:You will fail unless you work hard.,判断正误：,1.Unless you do not work,you will fail.(),2.Unless you finish your homework,I will see a film myself.(),unless从句和if从句的互换：,如果你不努力工作，你将会失败的。,If you dont work hard,you will fail.(同义句转换）,Unless you work hard,you will fail.,语法精炼：,（）1.The volleyball match will be put off if it_.,A.will rain B.rains C.rained D.raining,()2.Difficulties are nothing if we _not afraid of them.,A.will B.shall C.are D.do,()3.We _ to Beijing tomorrow if it doesnt rain.,A.are going B.would go C.be go D.will go,()4.I dont like to be interrupted if I_.,A.speaks B.will speak C.am speaking D.spoke,()5.If you _ the book you will understand the story better.,A.have read B.will be reading C.will have read D.reads,()6.Be careful,if you _ want to make mistakes.,A.wont B.dont C.didnt D.not,()7.Work hard if you _ to get a good mark.,A.wanted B.wanting C.want D.will want,()8.-I want to know if you _ to the party tomorrow.,-I will if I _ free.,A.will come;am B.come;am C.will come;will be D.come;will be,()9.If you _ a chance to study in a foreign country,just take it.,A.getting B.had not C.will get D.get,()10.Frank_ a film if hes free next Saturday.,A.see B.saw C.has seen D.will see,homework,抄写本单元if引导的条件状语从句。（二英一中）,