条件状语从句公开课.pptx
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whether 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?Ifitissunnythisweekend,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,what 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/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 exercise.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
