中考英语复习If引导的条件状语从句课件

初中英语if引导的条件状语从句主讲人：单位：eg:如果我有足够的钱，我就去环游世界If引导条件状语从句定义：if

“如果,假如”它引导的句子表示某事发生所需的条件，即“在…条件下，某事才能发生”，在句子中充当状语，因此称之为条件状语从句。IfIhaveenoughmoney,IwilltravelaroundtheworldorIwilltravelaroundtheworldifIhaveenoughmoney__________________ifI’mill.

IwillseeadoctorLookandsayIfI’mlate,_________________.Iwillsaysorry位置：从句可放在主句之前或之后，但是放在主句之前须有逗号隔开，放在主句后则不用

Ifitrainstomorrow,I_____________________.willwatchTVathomeIfit_____________tomorrow,________________.he’llplaybasketballdoesn’train用法：1.

如果主句是一般将来时，从句则用一般现在时（主将从现）。

Ifitrains（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.如果主句含有must,may,can等情态动词，从句也要用一般现在时（主情从现）。

Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.Ifyoufinishthehomework，youcangohome．如果你作业做完了就可以回家了。

Ifyouwanttoloseweightyoumust/shouldeatlessbread.

如果你想减肥，你必须少吃面包。3.如果主句是祈使句，从句同样要用一般现在时（主祈从现）。Don’tgoandplayfootballifyoudon’tfinishyourhomework.PleasecallmeifhecomesnextSunday.4.如果if引导的条件状语从句说的是客观事实或者是普遍规律的话，从句和主句都用一般现在时eg.Ifyoudropaglass,itbreaks.

Ifyouheatice,itmeltsif的反义词：if...not...=unless,意思是：“如果不，除非”

Iwon’tgothereunlessIhearfromyou.(同义句)Iwon’tgothere_____I_____hearfromyou.ifdon’tIwon’tgotothepartyifIamnotinvited.(同义句)Iwon’tgototheparty_____Iaminvited.unless变换：1.有if引导的条件状语从句的复合句中，当主句和从句的主语均为you时，可转换为“祈使句+and/or+一般将来时的句子”Youcanpasstheexamifyouworkhard.----------------，andyouwillpasstheexam.Ifyoudon'thurryup,youwillbelateagain.Hurryup,------youwillbelateagain.Workhardor2.借助介词with或without来转换。例如:Ifyouhelpme,I’llfinishmyjobsoon.

------------------,I’llfinishmyjobsoon.如果你帮我，我将很快完成我的工作。

Ifthereisnowater,fishmaydie.

Fishmaydie------------------.如果没有水，鱼可能会死。Withyourhelpwithoutwater注意事项1.在if引导的条件状语从句中，当主句是一般将来时时，不能够使用begoingto结构，而要用will。例如：I’llhelpyouwithyourEnglishifIamfreetomorrow.如果明天我有空，我会帮你学英语。2.在if引导的条件状语从句中不能够使用some，而要用any。例如：Ifyouhaveanyquestionstoask,pleasecometomyoffice.如果你有问题要问的话，请到我办公室来。

练习：1、如果明天不下雨，我就和同学们去野餐。2、如果你起来晚了，你上学将迟到。

3、如果你想节约能源，你应该骑自行车。

4、如果朋友有麻烦，我们应该尽力帮助他们。Ifitdoesn’traintomorrow,Iwillhaveapicnicwithmyclassmates.Ifyougetuplate,you’llbelateforclass.Youshouldrideyourbikeifyouwanttosaveenergy.Ifourfriendshavetroubles,weshouldtryoubesttohelpthem.Morepractice1.Ifyou______(drop)aglass,it______(break).2.He______(fail)intheexamifhe______(notstudy)hard.3.Unlessyou______(leave)now,you______(be)late.4.We______(have)abarbecueunlessit______(rain).5.Ifyou____(cool)water,it_____(turn)intoice.6.Hurryup,oryouwillmissthebus.___youdon’thurryup,you____catchtheearlybus.7.Studyhard,oryou’llmissfallbehind.______youstudyhard,you______fallbehind.8.Ifyoudon’tputonyourscarf,you’llcatchcold.Putonyourscarf,_____you’llcatchcold.9.Theinsurancecompanywouldpayhim2millionyuanifthevasewasstolen.Theinsurancecompany_____payhim2millionyuan_____thevasewasstolen.10.Idon’tknowifit_______tomorrow.Ifit____,Iwon’tgoshopping.(rain)dropbreakswillfaildoesn’tstudyleavewillbewillhaverainscoolturnsIfwon’tUnlesswillorwon’tunlesswillrainrainsHaveatry

用括号内所给词的正确形式填空1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.5.Ifshe____(be)kindtome,I__________(notargue)withher.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.7.Ifyou_____(pay)moreattentiontothat,he_________(notget)injured.goeswillhavestopshavewon’tgetdoiswon’targuecomescomeswillgivepaywon’tget8.MrLiwillbemadifwe_______(break)therules.9.Ifit_____(be)cloudy,they_______(notgo)therebyair.10.Pleaseletusknowifhe________(arrive)tomorrow.Pleaseletusknowifhe_________(arrive)tomorrow.

11.ShallIsay“Hello”whentheforeigner______(come)intotheclassroom?12.He’llgetb