条件状语从句公开课课件.ppt

Grammar,if从句,Revision,WhatwillIdoifitissunnythisweekend?,sleep,playcomputergames,goshopping,?,Part1:If的用法,1.Iwanttoknowifhewillgotoparkwithus.,2.Wewillhaveapicnicifitdoesntrain.,3.Ifyouboilwater,itbecomessteam.,4.Ifyoufeeltired,youmusthavearest.,宾语从句,条件状语从句,巧计、速记,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,宾语从句,if用于宾语从句中,whether/if,改为陈述句语序,由从属连词whether,if引导的宾语从句,e.g.1.Iwanttoknow_.（他是否跟我们一起去公园）2.Askhim_.（他是否能来）3.Ididntknow_.（是否要下雨）,if(whether)hewillgototheparkwithus,whether(if)hecancome,whetheritwasgoingtorainornot,当句末为ornot时，引导词只能用whether而不能用if.,If与whether的区别,Idontknow_hewillcomeornot.Idontcareof_heishandsome.Hewondered_tostayherethenextweek._hewillcomeisnotdecided.,与ornot连用只能用whether,介词后只能用whether,与todo不定式连用只能用whether,作主语只能用whether,If引导条件状语从句,Ifitissunnythisweekend,whatwillyoudo?,Ifitissunnythisweekend,I_footballwithmyclassmates.,Ifitissunnythisweekend,I_.,willplay,Ifitissunnythisweekend,whatwontyoudo?,Ifitissunnythisweekend,I_.,Ifitissunnythisweekend,I_.,Wontstayathome,wontwatchtelevision,Ifyouhaveapicnicatweekends,whatwillyoubuy?,If_,_.,Ifdogbitesyou,whatshouldyoudo?,Askforhelpfromteachers/parents/friends.,washthewound,callforhelp,takemedicine,seethedoctor,Ifadogbitesyou,first,youshould_.Then,youshould_.Next,youshould_.Andyoushould,Staycool,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,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,1.Imsureifhe_(go)totheparty,he_(have)agreattime.2.Iftherain_(stop)tonight,wewillgotothecinema.3.IllbuyacomputerifI_(have)enoughmoney.4.You_(notget)nervousifyou_(do)enoughexercise.5.Iwanttoknowifhe_(come)tomorrow,ifhe_(come),I_(give)themassagetohim.,goes,willhave,stops,have,wontget,do,comes,willcome,willgive,Exercise:,Part2:Unless的用法,Youwillfailtoarrivethereintimeunlessyoustartearlier.,Ifyoudontstarte