If引導(dǎo)的條件狀語(yǔ)從句Ifitrains,wewon’tgo.從句主句Wewon’tgoifitrains.主句從句哪部分是從句，哪部分是主句？比較這兩個(gè)句子，有什么不同？發(fā)現(xiàn)if條件從句有什么規(guī)律？當(dāng)從句在主句前，_____(用/不用)逗號(hào)隔開(kāi)。當(dāng)主句在前，_____(用/不用)逗號(hào)隔開(kāi)。用不用If作為“如果”意思，引導(dǎo)的條件從句的四種時(shí)態(tài)1.主現(xiàn)從現(xiàn)

Ifyouheattheice,itmelts(融化).2.主將從現(xiàn)

Ifyougetuplate,youwillbelate.3.主祈從現(xiàn)

Ifyoufeelcold,closethedoor.

4.主情從現(xiàn)（can，may，should，must）

Ifheisill,hemustseethedoctor.描述客觀(guān)事實(shí)和普遍現(xiàn)狀描述一種有可能發(fā)生的情況描述讓別人去做某事的情況Ifyouwanttogetgoodmarks,

dowhat?Don’tdowhat?Ifyouwanttogetgoodmarks,__________.Ifyouwanttogetgoodmarks,don’t__________.studyhardlistentoteachercarefully.dohomeworkbyyourself.

copyyourhomework.talkintheclassbeabsent-mindedintheclassIfitissunnythisweekend,

whatwillyoudo?Ifitissunnythisweekend,I__________footballwithmyclassmates.Ifitissunnythisweekend,I__________mycomputer.willplaywillmendIfitissunnythisweekend,

whatwon’tyoudo?Ifitissunnythisweekend,I_____________________.Ifitissunnythisweekend,I_____________________.Won’tstayathomewon’twatchtelevisionIfyouhaveenoughpocketmoney,whatwillyoubuy?IfIhaveenoughpocketmoney,I____________________.If

youfeelhungry,you

should

eatsomething.Ifyoufeeltired,you

must

havearest.If

youareill,youshouldgotoseeadoctor.If

youareridingabikeinthestreet,you

must

beverycareful.剛剛說(shuō)的是if作為“如果”的意思，但如果if作為“是否”的意思，又會(huì)怎樣呢？1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.goeswillhavestopshavewon’tgetdocomeswillcomewillgive1.I’llringyouup

IgettoAmerica．2.______itrainstomorrow,thesportsmeetingwillbeputoff.3.Theywalkedoutoftheroom

themeetingwasover.4.IthinkChineseis____interesting____English.5.Thismountainis______steep______wecanhardlyreachthetop．6.__________sheiseighty,shelooksstrongandhealthy.7.Hesatinthedark_________hecouldn’tbeseen.assoonasIfbecauseasassothatEventhoughsothat填空:Ifsothateventhoughbecauseso…thatas…asassoonasI__________(record)theCDforyoutomorrow.Doessheoften_______(lend)moneytoherbrother?Thesnake________(notappear)ifyoumakenoise.Shealways_______(warn)younottowatchTVintheevening.Inthefinalexam,I_______(get)goodmarks.Myfarther_______(realise)thatitisimportanttostaycool.willrecordlendwon’tappearwarnswillgetrealisesTheboyissoyoungthathecan’tgotoschool.=Theboyistooyoungtogotoschool.=Theboyisnotoldenoughtogotoschool.Practice:Theroomis

small

holdsomanypeople.=Theroomis_____________toholdsomanypeople.=Theroomis___small

itcan’tholdsomany