初中英语初一-if条件句

--if条件句【知识要点】定义:常有的if条件状语从句表示在某条件下,某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。E.ｇ．Ｉｆyoｕａskｈｉm，heｗiｌlheｌｐyｏu.如果你请他帮忙,他会帮你的。.g．Ifyoｕfaiｌｉntheeｘaｍ,yｏuwilllethiｍｄｏwn．如果你考试不及格,你会让他失望的。E．g.Ifｙouhavefinishｅdtheｈｏｍｅwｏｒk,ｙｏuｃangｏｈome．如果你作业做完了就能够回家了。此外，ｉf从句还表示不可实现的条件或根本不可能存在的条件，也就是一种虚构的条件或假定。从句多用一般过去时或过去达成时，表示对现在或过去的一种假定。Ｅ.g.IfＩweｒeyoｕ,Ｉｗouｌｄinvitehiｍtｏthepartｙ．如果我是你，我会邀请他参加聚会。E.g.ＩwｏuldｈavearrivedmｕｃhｅarlｉｅrifIhadnｏtbeeｎcauｇｈtinｔｈeｔｒaｆfic.要不是交通拥塞,我本会来得早一些。此外你还要注意if条件句的时态搭配１.ｉｆ从句用一般现在时,主句用一般将来时E.g.Iｆherunshe’llgettherｅinｔｉme.如果他用跑的，他就会实时赶到那边。E.g.Theｃａｔwｉlｌｓｃｒatchyｏuiｆyoupullhertail．如果你拉猫的尾巴,它就会抓你。2.if从句用一般现在时,主句用mａｙ/mｉgｈt／canE.g.Iftｈefoｇgｅtstｈiｃｋerｔｈeplanemａy／miｇｈｔｂｅdivｅｒｔed.如果雾在大一些，飞机可能就会改在其他机场降落。E.g．Ifiｔstｏｐssnoｗingwecangoout.如果雪停了,我们就能够出去。3．if从句用一般现在时，主句用mｕst／shｏulｄE.g.Ifyｏuwａnttｏlosｅｗｅｉghtyoumust/shoｕlｄeatleｓsbｒead.如果你想减肥,你必须少吃面包。4．ｉf从句用一般现在时，主句用一般现在时----E．ｇ.Ifyouheａtiｃeitｔurnsｔowａｔer．(也可用ｗilｌturn)如果把冰加热,它就会化成水。5．if从句用现在进行时，主句用一般将来时.g.ＩfyｏｕａｒeloｏkinｇforＰeterｙｏｕ’llｆindhimupsｔaｉrs．如果你是在找彼得，上楼就会找到他。6.if从句用现在达成时,主句用一般将来时E.g．IfyoｕhaveｆinisheddinnerI’ｌｌaｓkｔhewａｉterｆorthebilｌ．如果你吃完了,我就叫服务生来算账注意：学习"ｉf"引导的条件状语从句的用法,现在总结一下：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，主句多用将来时;条件句表事实，主句常用现在时。在ｉf引导的条件状语从句中,如果从句讨论的是一个有可能发生的事实及其产生的有关的结果,主句用一般将来时态,从句用一般现在时态。如:E．g．Weｃanｗａlkthｅrｅiｆwecan'tfiｎdabuｓ.E.g．Ifiｔrａinstomｏrrow,wewｉｌlnｏtgoｔoｔhｅzoo.Ｅ.ｇ.Whaｔwillｙoｕｄoｉfyｏｕｆindapandａindangｅr.如果if条件句讨论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。E.ｇ.Ifbeａrｓａｒeindanｇer，ｔheyaｔtacｋpｅoｐle.在if引导的条件状语从句中，if和条件句地点灵活，可直接放在主句后边,若iｆ条件句放句首，从句后边要加逗号，和主句分开。还要注意前后时态一致原则【经典练习】用所给词的适合形式填空1．Ifyou___＿__＿_(feeｌ)tireｄ,you________＿＿__＿_＿（ｈave）tohavearest．2.Ｗherｅ＿___＿__ｈe____＿___＿(see)ｔhｅfiｌmｉfhe_______＿___＿_＿__（have)tiｍe?----３．Iｆthere＿_________（be)ｆeｗertreeｓ,tｈere＿＿_____＿＿__＿___(ｂe)moｒepollution..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______＿＿_＿___(seｎｄ)meabeａutifulsｏuvenirifhe______＿___＿____＿(toｕr）Spaiｎ.10.IfMrＧreen＿___＿＿_____(say）Iamhard-workｉnｇ,ｍypａrenｔｓ_＿_＿_＿＿＿（ｆｅel)glａd.1１．I_________＿__(gｏ)totheｂeａchifit＿__＿＿____＿__＿_＿_（ｎoｔrａｉn)thisｗeek.2.＿_＿_____＿_they___＿____＿＿（hａve）ａmatｃhiftheP．Ｅ.teacheｒ＿＿_＿_＿＿______（be)ｂusy?13．Ｈe____(write)alettｅrtｏhｉsgrandpaｒenｔsiｆｈe__＿_(geｔ)hisrepｏrtcａrdthｉsｗeek.14．Ifsｈe＿＿＿___＿__＿__(gｅt）ｕplate，she_____＿___＿___(ｎoｔcatch)ｔhｅｅarlｙbus．15.Petｅr______＿_(ｍajoｒ)inＥｎglishｉfhｅ＿＿__（ｐasｓ)ｔheeｘaｍｓinPekiｎｇＵnｉversｉty.翻译句子1.如果他到的晚了会发生什么事情？Wｈaｔ＿＿__＿______＿___ifhe_＿＿＿_____＿___late？2.如果努力学习，你就会取得好成绩。Ｉｆyou＿__________＿_＿_＿_＿_,ｙou＿____＿_____good_＿＿_＿________.3．他如果看电视太久了，他的父亲母亲会不高兴。Iｆhe_＿___＿__＿TＶｔoｏｍuch，hispaｒents＿____＿＿_＿_＿____＿＿___unhappｙ．----如果我们为他组织生日聚会,大家都会来的。Everyoｎe_＿__＿___________iｆwe__＿＿_＿___＿__＿abiｒthdａｙprｔｙ____＿__＿__hｉm.如果明天不下雨,我会和你一同去公园的。Iｆit＿__________＿＿____＿__tomｏｒrｏw,I_＿_＿_________＿ｇotothepark___＿_＿_＿＿you.如果她睡过头了，就会旅游迟到的。Sｈe________________＿＿___＿＿＿__theｔrｉｐifshe__＿____＿___＿_____.如果他有空，他会帮助你的。Ifhｅ_____＿____＿＿＿____，he＿__＿_＿＿__＿＿＿__＿__yoｕ．如果Ｔoｍ考试不及格，他就没有时机上高中了。Tom＿_____＿__havethe__＿___＿_ｔｏgｏtｏthｅ＿_＿_____hiｇｈｓｃhoolｉfhe_＿＿___＿_ｔheexａｍs.一般将来时专项练习一、单项选择()1.Theｒe__________ameetｉngtoｍorrowａfteｒnoon.A.wｉlｌbegoingtoＢ.willgoinｇtobeC.isgoingｔobeD.wilｌgｏtobe()2.Chａrlie＿_____＿_hｅrｅnｅｘtmｏnth.A.isn’tｗorkingB.doesｎ’tｗｏrkingＣ．iｓn’tｇoiｎｇtoｗorkiｎｇD．won’twork()3.Ｈｅ_＿______veｒybuｓｙthｉｓweek,he________freenｅxtweek．A.willbe;ｉsＢ.is;iｓC.willｂe;wilｌbｅＤ.iｓ；ｗillbe()4.There___＿_＿＿_ａdolphｉnｓhoｗinthezootomorｒoweｖｅiｎｇ.Ａ.ｗasB.ｉsｇｏiｎgtohaｖeＣ．wiｌlhaveＤ．ｉｓgoingtｏbe()5.–you___＿__freｅtomorrｏw?–Ｎo．I_____ｆｒｅethedayａｆtertomorroｗ.Ａ.Are;goingto；ｗillB.Are;gｏｉngtobe;willC.Arｅ;goingｔo；willbeD．Are;goiｎgtｏbe;wｉllbe()6.Moｔher_＿_____＿mｅaｎiｃeprｅｓentoｎmynexｔｂirthday．A.willｇiveｓB.willgivｅC.givesＤ．give()７.–ＳhａllIbｕyacupoｆteａfｏrｙou?–.----（不，不要。)A.No，yoｕwon’t．B．Ｎo，youａｒeｎ’t.C.Ｎo,pleaｓeｄｏn’t.D.No,pleａsｅ.()8.–Wherｅｉsthemoｒningｐaper?–I＿_______iffｏｒyoｕaｔonce.A．getB.aｍｇettｉngC.toｇetD.ｗillｇet()9._＿____＿＿ａｃonｃertnextSaｔurday?A.TｈeｒeｗiｌlbeB．ＷiｌltｈerｅｂeC.TherｅｃanbeD.Tｈeｒeare()１0．Iｆtheyｃｏmｅ,we＿______＿ameeｔing.A.ｈaveＢ．ｗｉllhａvｅC．haｄD.woｕlｄhａvｅ()11.Ｈe_＿＿＿＿_＿_ｈeｒaｂｅauｔifｕlhａｔoｎhernextbｉrｔhday.A.giｖesＢ.ｇａveC．willgivinｇD.iｓgｏingtoｇiviｎｇ（)1２.Ｈe＿__＿___＿touｓassoonａshegetsthｅre．A.writｅｓB.haswrittenC.ｗillｗrｉteD.wｒote(）13.He_＿_＿____inthｒｅedays.A.comingｂａckB.cａｍeｂackC．wｉlｌcｏｍeｂackＤ.ｉsgoingtocomingback（)14.Iｆｉt________tｏｍｏrrow,we’llgoroller-ｓkatｉng.A.isｎ’trainＢ．won’ｔｒainC．doｅｓｎ’trainD.ｄｏesn’tfiｎｅ(）15.–WｉllｈiｓpａreｎtｓgoｔoｓeｅtｈeTerraＣotｔaＷariｏrｓtomorrｏw?–No,＿______＿(不去）.A.thｅywilｌn’t.B.thｅyｗon’t.C.ｔheyａren’t.D．theyｄｏn’t.()16.Wｈｏ＿_______wｅ___＿_＿＿_swｉmｍingｗithtoｍorｒｏwafeｒｎoon?A.ｗill;goＢ.dｏ;gｏC.wilｌ;goiｎgD.shａlｌ；gｏ()17.Ｗe＿＿_＿＿___theｗｏrkthｉsｗａynexttｉme.A.ｄoB.wilｌdoC.goinｇtodoD.wiｌldoing()18.Ｔomorｒｏwｈe___aｋｉｔｅｉｎｔheopenairfirst,aｎdten＿＿__bｏaｔｉnginthｅpaｒｋ.A.willfｌｙ;wｉllgｏB.ｗillflｙ;gｏesＣ.isgｏingtoflｙ;willgoesD.flies;wｉｌｌgo()１9．Thedayafteｒｔｏｍorrowthey_______＿ａvolleybａlｌmaｔcｈ.Ａ.wｉllwatｃhｉngB．ｗatchesC.iｓwａtchingD.ｉｓgoingtｏwatch(）20.Tｈerｅ＿＿_＿＿＿_＿abirｔhdaｙpartyｔｈｉsＳunｄay.Ａ.ｓhａllbeB.willbeC.shallgｏingｔobｅD.ｗillｇ----ingｔobe(）21.Thｅy＿__＿____aｎEnglisｈevｅniｎgnexｔSunｄａｙ.A.arehａvｉngＢ.aｒegｏingtohavｅC.ｗｉllhavinｇD.isｇｏｉnｇtｏhａｖe()22._____＿__you_______＿freｅnextSuｎday?A.Wｉｌｌ；areＢ.Wｉll；bｅC．Do;bｅＤ.Ａre;be()23.He__＿_____thereattenｔomoｒｒowｍｏrｎiｎｇ.A.willB.ｉsＣ．willbeD.be（）24.＿__＿＿＿__yourbroｔheｒ_＿____＿_amagazｉnefromtheliｂrary?Ａ.Are；ｇoingｔｏborrowB.Ｉs；ｇoingtoborroｗＣ.Ｗill;borroｗsＤ.Arｅ；goiｎgｔoｂorrowｓ()25.–SｈalｌIcomｅaｇaｉntomorrowaｆternooｎ?–____＿___(好的）.A.Yes，pleａｓeB.Yes，ｙouwiｌl．Ｃ.No，plｅaｓe.D.No,youwon’t．()26.It_____＿__theｙｅａｒofthｅhorseneｘtｙｅar．Ａ.ｉsgoinｇｔｏｂｅB.isgｏｉnｇtoＣ.wｉlｌｂｅD.wilｌiｓ)２７.＿_____＿＿openthewinｄow？A.ＷｉllyｏupleaseＢ.PleasｅwillyｏuC.YｏuplｅaseD.Doｙou()2８．–Ｌet’ｓgooutｔｏplａyfooｔbaｌl,sｈaｌlwe?–O.I___＿_＿__．Ａ.ｗilｌcomingB.bｅgoingｔｏcomeC.comeD.mcｏｍinｇ()29.It_＿_____＿usａｌongtimetoleaｒnEｎｇｌishweｌl.A．ｔakesB．wｉlｌtakeC.spendsD.ｗillsｐend()30.Tｈetraiｎ_____＿_＿ａt1１.Ａ.goiｎgtｏａrriveB．ｗillbearrｉveC.isgｏinｇｔoD.iarｒiｖing二、动词填空。1.I___＿__(leaｖe)inamiｎute.I_＿＿_＿_（fｉnｉsｈ）alｌmyｗｏrｋbｅforeI_