试讲——初中英语条件状语从句ppt课件.ppt

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1、条件状语从句“主将从现”,1,1，if意为“如果”,什么是：主将从现？,2，主句是一般将来时，从句要用一般现在时,3，分清！从句：由if引导的句子,2,条件状语从句主将从现,If 引导：从句-现在时，主句：,Unless引导：=if not,1，将来时（重点！）,2，祈使句、情态动词,3，现在时（特殊情况）,3,If sentences,If sb does sth,sb will do sth=sb will do sth if sb does sth,主句（将来时）,从句（一般现在时）,1，if从句-一般现在时，主句-将来时（重点！）,4,If the telephone rings,I

2、will answer it.,If you get up late,you will be late for school.,Look and say,5,If you feel hungry,you should eat something.,If you feel tired,please have a rest.,6,If sentences,If sb does sth,please do sthIf sb does sth,sb may/must(情态动词)do sth,主句（情态动词+do）,从句（一般现在时）,2，if从句-一般现在时，主句-祈使句或情态动词,主句（祈使句）,从

3、句（一般现在时）,7,If sentences,If sb does sth,sb/sth does sth=sb/sth does sth,if sb does sth,主句（一般现在时）,从句（一般现在时）,3，if从句-一般现在时，主句-一般现在时（客观事实）,主语的行为将导致某种必然发生的结果时,8,1.Take a fish out of water,die2.Heat metal,melt,If you heat metal,it melts,If you take a fish out of water,it dies.,Examples,9,小结1If 引导：,从句-现在时，主

4、句：,1，将来时（重点！）,2，祈使句、情态动词,3，现在时（特殊情况）,总结：if条件状语从句考的频率比较高，考点有3：1，if从句的时态2，if 表示“如果”和“是否”时态的区分3，连词的选择（if，unless，when.）,10,If there no buying and selling of animals,there()no killing in nature.【2011陕西】A.is;will he B.will be;will be C.is;is D.will be;is2.We will go for a picnic if it_tomorrow.【2012浙江衢州】A

5、.doesnt rain B.wasnt rainy C.wont rain D.wasnt raining,中考题型,条件状语从句,11,3.I dont know if she to my birthday party tomorrow.If she,Ill be very happy.【2011湖南益阳】A.comes;comes B.will come;comes C.comes;will come4.If you _ him tomorrow,please ask him if he _ to work on the farm with us.A.see;goes B.will se

6、e;goes C.will see;will go D.see;will go,中考题型,条件状语从句,如果,是否,12,条件状语从句只有if引导一种吗？,比较：1，In summer,food goes bad easily,_ it is put in the refrigerator.（2010山西中考）A.until B.if C.unless,2，I dont like bread.I wont eat it,_ I am very hungry.(2009内江中考)A.when B.unless C.if,13,Unless sentence,从句一般现在时，主句将来时但是：与if

7、意思相反！“除非”sb will do sth unless sb does sth,if sb does not do sth,Eg:You will be late for school you now.You will be late for school you now.,unless,leave,dont leave,if,14,1.Well go for a picnic unless it _ this Sunday.【2012福建福州】Wish you a lovely weekend.A.rains B.doesnt rain C.wont rain 2.You cant w

8、atch TV _ you finish your homework.【2011内蒙古包头】A.unless B.if C.while D.as,中考题型,条件状语从句,15,3.Susan will not arrive at the airport on time,_ she hurries up.(2008河北中考)A.once B.if C.when D.unless,中考题型,条件状语从句,16,总结：条件状语从句主将从现,If 引导：从句-现在时，主句：,Unless引导：=if not,1，将来时（重点！）,2，祈使句、情态动词,3，现在时（特殊情况）,17,课后练习：（练习全部理解，说明你掌握了今天的重要内容啦！）,1,We will play basketball,_ tomorrow.如果明天不下雨，我们将打篮球。除非明天下雨，我们将打篮球。2，Tommy,do you know if Frank _ to the zoo this Sunday if it _?Sorry,I have no idea.(2009孝感中考)A.will go;is fine B.goes;is fine C.will go;is going to be fine D.goes;will be fine,18,See you!,19,