if条件状语从句教案

if条件状语从句教案
重点难点
1.Keyvocabulary:friendshipn.友谊classmaten.同班同学
infact事实上personaladj.个人的
2.if引导的条件状语从句
教学方法
Bottom-up,interactiveapproach
教学过程
Explainhowtoimportthecours,mainlytheschoolofdesign,knowledgedevelopingetc.
Teachingpoint:
TounderstandtheconversationoftalkingaboutAustralia.教学过程:
课前延伸
设疑激趣,导入新课。
Ifthere is nobuyingandllingofanimals,therewillbenokillinginnature.
Thestudentswon’thaveasportsmeetingthisweekendifitrains
Ifshecomesheretomorrow,Iwilltellyou.
翻译以上几个句子。
课内探究
Step1
If从句的构成:
Ifyouaskhim,→从句
hewillhelpyou.→主句
如果你请他帮忙,他会帮你的。
Printthephotoifyoulikeit.如果喜欢这张照片就把他打印出来。
↓↓
主句从句
If:从属连词,意思是:“如果,假如,倘若”
Step2
If从句的位置:
if引导的条件状语从句既可以放在主句前,也可以放在主句后。从句位于主句之前时,常用逗号与其隔开。
Step3
If从句的时态:
主祈从现:
Ifyouwanttogetgoodmarks,
studyhard.
listentoteachercarefully.
dohomeworkbyyourlf.
Ifyouwanttogetgoodmarks,
Don’ttalkintheclass.
copyhomework.
cheatintheexam.
主将从现:
Ifitissunnythisweekend,Iwon’tstayathome.
Iwon’twatchTV.
IfIhaveenoughmoney,Iwillbuyamobilephone.
Iwillbuyacar.
IfIinviteforeignerstoChina,IwillgotoWestLake.
IwillgotoMountTai
主情从现(canmayshouldmust):
1Ifyoutired,youmusthavearest.
2Ifyoufeelhungry,youshouldeatsomething.
3Ifyouareill,youshouldgotoeadoctor.
虚拟语气的条件或假设时,从句多用过去时或过去完成时:
IfIwereyou,Iwouldinvitehimtotheparty.
IwouldhavearrivedmuchearlierifIhadnotbeenCaughtinthetraffic
1.Ifhe hard,hewillgetgoodgrades.
A.study               B.studies
C.willstudy         D.studied
if意为“如果”,引导条件状语从句,可放在主句后,也可放在主句前,常用逗号隔开,主将从现,选B。
2.MarywillgotoSanyaifshe
afive-daytrip.()
A.have                B.had
C.willhave          D.has
if意为“如果”,引导条件状语从句,主句用将来时态,从句用一般现在时,选D
3.Pleastayathomeifittomorrow.
A.rainsB.rained
C.willrainD.rain
if引导条件状语从句,主句放在从句之前,主句是祈使句,从句用一般现在时,选A
精讲点拨
if引导的条件状语从句与if引导的宾语从句的区分:
1、if在句中的含义不同:
Iwanttoknowifheisateacher.
↓whether
if在宾语从句翻译为“是否”。
I’llgotoeyouifIamfreenextweek.
↓如果
if在条件状语从句中翻译为“如果”
2.if在从句中的位置不同:
Idon’tknowifthetrainhasarrived.
Iwillgoouttomorrowifitdoesn’train.
If引导的宾语从句放在主句之后;而if引导的状语从句可放在主句之前也可放在主句之后
If引导的条件状语从句放于句首时多用逗号隔开;而if引导的宾语从句则不能。
3.时态要求上有区别:
(1)Iwanttoknowifthereasportsmeetingnextmonth.
If引导的宾语从句的时态由主句及本身时态决定
(2)Ifit,we’llholdit.
If引导条件状语从句的时态为一般现在时记住“主将从现”
学后用Practice
一、找出下列句子中那些是if引导的条件状语从句,那些是if引导的宾语从句?
1.Canyoutellmeifshecancometothemeeting?
2.Shewillnotgothereifitisrainytomorrow.
3.Ican’tguessifshewillbeangry.
4.Ifwehelpeachother,webothwillgetgoodresults
二、用所给词的适当形式填空。
1IfI_______________(notunderstand),Iwillaskmyteacherforhelp.
2IfI__________(copy)yourhomework,Iwillcheatmylf.
3Ifshe_______________(notget)upearly,she’llmisstheearlybus.
4Ifyourmother_______(buy)thebookforyou,itwillbegoodforyourstudy.
课后提升
1、Ifshe       heretomorrow,Iwilltellyou.
A.comes             B.willcome        C.come       D.came
2、I’mwaitingformyfriend.     ,I’llgoshoppingalone.A.Ifshecomes  B.Ifshedoesn’tcomeC.Ifshewon’tcome
3、—Tomwantstoknowifyouwillhaveapicnictomorrow.
—Yes.Butifit______,we’llplaychessinstead.
A.willrain           B.rained            C.israining        D.rains
4、IfTom_____thegame,we'llgivehimasurpri".
A.win    B.wins     C.won          D.miming
二、用所给词的适当形式填空。
1.Ifyou________(feel)tired,you_________(have)tohavearest.
2.Where_____he____(e)thefilmifhe_________(have)time?
3.Ifthere____(be)fewertrees,there_______(be)morepollution.
4.He___(dress)morecasuallyifhe___(notwork)onweekends.
5.IfMarcia_______(live)alone,she_______(keep)apetparrot.
6.Lana_____buy)anewdressiftheoldone____(be)outofstyle.
7.Thetwins_______(fight)ifthey__________(argue).
8.I______(have)abakesaleifI____(need)moneyforeducation.
9.Peter____(nd)meabeautifulsouvenirifhe____(tour)Spain.
10.IfMrGreen_______(say)Iamhard-working,myparents___(feel)glad.
三.完成句子。
1.如果他到的晚了会发生什么事情?What___________ifhe____late?
2.如果努力学****你就会取得好成绩。Ifyou_____________,you_________good_______.
3.他如果看电视太久了,他的父母会不高兴。Ifhe_____TVtoomuch,hisparents______________unhappy.