条件状语从句公开课.pptx

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1、WhatwillIdoifitissunnythisweekend?第1页/共18页Part1:If 的用法 1.Iwanttoknowifhewillgotoparkwithus.2.Wewillhaveapicnicifitdoesntrain.3.Ifyouboilwater,itbecomessteam.4.Ifyoufeeltired,you,you must havearesthavearest.宾语从句条件状语从句第2页/共18页语法1：if作为宾语从句的引导词，引导宾语从句。（是否）语法2：if（如果）引导的条件状语从句第3页/共18页宾语从句 if 用于宾语从句中原句式原句式

2、引导词引导词从句语序从句语序一般一般疑问句疑问句whether/if改为陈述句 语序第4页/共18页由从属连词whether,if 引导的宾语从句e.g.1.I want to know _.（他是否跟我们一起去公园）2.Ask him _.（他是否能来）3.I didnt know _.（是否要下雨）if(whether)he will go to the park with us whether(if)he can come whether it was going to rain or not当句末为or not时，引导词只能用whether而不能用if.第5页/共18页If 与whet

3、her 的区别I dont know _ he will come or not.I dont care of _ he is handsome.He wondered _ to stay here the next week._ he will come is not decided.与or not 连用只能用whether介词后只能用whether与to do 不定式连用只能用whether作主语只能用whether第6页/共18页If 引导条件状语从句 第7页/共18页If it is sunny this weekend,what will you do?Ifitissunnythis

4、weekend,I_footballwithmyclassmates.Ifitissunnythisweekend,I_.willplay第8页/共18页If it is sunny this weekend,what wont you do?Ifitissunnythisweekend,I_.Ifitissunnythisweekend,I_.Wontstayathomewontwatchtelevision第9页/共18页If you have a picnic at weekends,what will you buy?If_,_.第10页/共18页If dog bites you,wh

5、at should you do?Ask for help from teachers/parents/friends.wash the wound call for helptake medicinesee the doctorIfadogbitesyou,first,youshould_.Then,youshould_.Next,youshould_.AndyoushouldStay cool第11页/共18页if条件句不一般,几个要点记心间;条件句,放在前,逗号要放句中间。条件句表可能，主将从现不一般；条件句表事实，主句常用现在时If还有“是否”意,宾语从句放后边summary第12页/

6、共18页分析试题特点及做题思路：分析试题特点及做题思路：考连词-做题思路考时态-做题思路：分析句子-判断关系-选择正确的if的用法认字-判断语境提供的时态特点-选择正确的时态第13页/共18页1.Im sure if he _(go)to the party,he_ (have)a great time.2.If the rain _(stop)tonight,we will go to the cinema.3.Ill buy a computer if I _(have)enough money.4.You _(not get)nervous if you _(do)enough exer

7、cise.5.I want to know if he _(come)tomorrow,if he _(come),I _(give)the massage to him.goeswillhavestopshavewontgetdocomeswillcomewillgiveExercise:第14页/共18页Part2:Unless的用法 YouwillfailtoarrivethereintimeYouwillfailtoarrivethereintimeunlessyoustartearlier.unlessyoustartearlier.Ifyoudontstartearlier,Ifyoudontstartearlier,youwillfailtoarrivethereintime.youwillfailtoarrivethereintime.unless=if.not除非,若不,除非在的时候第15页/共18页首字母填空（连词）做题思路首字母填空（连词）做题思路：1.找出关键词汇找出关键词汇2.判断主从句的关系判断主从句的关系3.选择正确的连词选择正确的连词第16页/共18页Homework:1.复习连词的用法2.做卷子上剩余的练习第17页/共18页感谢您的观看！第18页/共18页