if和unless区别和练习

语法Chapter1和引导的条件状语从句If unless我们用引导的条件状语从句来探讨可能的条件以与该条件成立时可能的结果if学习引导的条件状语从句的用法，我们可先从如下的口诀入手:if条件句不一般，几个要点记心间;H条件句，放在前，逗号要句中间条件句表可能，主句多用将来时；条件句表事实，主句常用现在时假如我们找不到公车，也能走路We canwalk thereif we can tfind abus.去那里主句条件状语从句假如明天下雨，我们就不去动If itrains tomorrow,we willnot go to thezoo.物园条件状语从句主句What willyou goif youfind someonein danger✓xz/v/v/v/w/v/vz/vzxzxzvzxzv/vzxzv/v/xzv/v/\zv^Kz/w^/v/wvzv^^^/xzxzx主句条件状语从句假如你发觉某人有紧急，你会怎么做？条件句有不同的类型，简述如下If用条件句表达客观真理或一般现象

1.if条件句用于表达客观真理或一般现象时，主，从句时态均用一般现在时，如:If Eg.Ifyou freezewater,it turnsinto ice.A fishdies if you takeit outof water.用条件句表示将来可能发生的事情

2.if在表示将来可能发生的事情的条件句中，主句用一般将来时，而从句用一if if般现在时表示将来的时间，即主将从现假如我宠爱这房子，我就会把它买下Eg.If Ilike thehouse,I willbuy it..假如我见到她，我就会告知她I willtell herif Isee her主句中的也可以用情态动词或等代替如:will can,may might.假如他们很友善,Eg.If theyare friendly,I mightinvite themto theparty我可能会请他们去参加聚会假如我们现在抓紧时间，就可If wehurry now,wecanstop forcoffee later.以稍后去喝咖啡意:在条件句中，主句部分只能运用动词will的一般将来时,不能运用be going to的结构二.的条件句Unless表示在特定条件下，才确定做或不做一件事，中文用的连接词一般是“除非”和“否则”如除非刮台风，否则演唱会将如期进行在英语中，我们可以用unless表达这个意思，相当于以这个句子为例if notTheconcert will be held as scheduleunless there is atyphoon.=the concertwill beheldasschedule ifthereisnot atyphoon她会始终唱下去，除非有She willkeep onsinging unlessshe istold to stop.人叫她停止=she willkeep onsinging ifshe isnot toldtostop也可以用武否则）来做同义句转换Unless youlisten carefully,you won t know the answer.=if youdon tlisten carefully,you won t knowthe answer.=you shouldlisten carefully,or youwon tknowtheanswer.深圳中考题

1.If Ihis phonenumber,I willtell you.A.find B.found C.will findD.have found

2.We will go campingif ittomorrow.,,A.Won train B.didn train C.doesn train D.isn training

3.I’m waitingfor myfriend.If he,I swimmingalone.A.doesn tcome;will goB.won tcome;will go,C.will come;won t go D.don tcome;willgo

4.you goto thesupermarket at7p.m,you canbuy alot ofcheap food.A.If B.Unless C.Whether D.When

5.I won t getto theparty ontime Icatch thefirst traintomorrowmorning.A.If B.Unless C.Whether D.When

6.Shall wego ona picnicthis weekendGoodidea!Unless it.A.rains B.doesn train C.rain D.won train,

7.Can Ichange thejacket foranother oneit doesn t fitmewellOf course.A.unless B.if C.that D.though

8.Nobody canlearn mathswell heworks hardon it.A if B unless C thoughtD however

9.If fishaway fromwater,they die.A aretaking,won tB aretaken,willC arebeing taken,will Dtake,wont

10.Each studentcan askteachers forhelp ifhe howto workout theproblem.,,A willknow Bwontknow Cdon tknow Ddoesn tknow练习A womanshould neverbe seeneating ordrinking,unless itbe lobstersaladand Champagne,the onlytrue feminineand becomingviands.Lord ByronI dont feelright unless I havea sportto playor atleast away toworkup asweat.Hank AaronNogreat poetry,of whateverkind,is conceivableunless thesubjecthas becomeintegrated withthe poefsmind andmood.Lascelles AbercrombiePmnot goingto justsay nicethings abouteverybody unlessI meanit.F.Murray AbrahamUnlessyoure willingto havea go,fail miserably,and haveanother go,success wonthappen.Phillip Adams

1.If Iyou,I veryhappy.A.were,would beB.am,shall beC.were,shall beD.am,would be

2.If hehad notlost hismoney,he thepiano lastweek.A.would buyB.had boughtC.could havebought D.bought

3.1known it,I shouldhave toldhim.A.Have B.Had C.Having D.If

4.the clouds,you wouldfind theairplane inthe skyeasily.A.Were itnot forB.If ithad not been forC.If itwere notD.Had itnotbeenfor

5.If Ihad knownthat,I so.,A.wouldn tdo B.wontdo,C.didn tdo D.wouldnt havedone

6.If itso hard,we dgototown.,A.isn training B.weren trainingC.doesntrain D.isn tgoingtorain答案答案.答案.答案.答案.答案L A2C3B4A5D6B

7.He youifyouto seehim thatafternoon.A.might tell,were goingB.told,were goingC.might havetold,had goneD.should tell,went

8.If youhad startedsooner,you there.A.may havegot B.might havegotC.shall havegot D.must havegot

9.If wewere tobe2oo yearsold,we everything.A.will changeB.can changeC.could changeD.shall change

10.Idont thinkthat Ishall fail,but ifI Iwould tryagain.A.fail B.would failC.should failD.had failed

11.If youto seeMary,what wouldyou tellherA.are B.willbegoing・C.must Dwere

12.If thetrain leavesat halfpast ten,there notime tolose.A.would B.is C.will D.has.答案.答案.答案.答案.答案.答案7C8B9C10C11D12B除非,假如不（）unless…”=if…not［例句］假如不下雨，我明天去wl shallgo tomorrowunless itrains.-Shall Tomgo andplay football除非他完成作业，否则不能出去-Not unless he hasfinished hishomework.除非他本人来邀请我，I wontgounlesshecomes toinvite mehimself.w不然我是不会去的（I wont attendhis birthdayparty unlessinvited=unlessIam）除非被邀请，否则我不去参加的生日晚会invited.

1.The menwill haveto waitall daythe doctorworks faster.（北京春季）2023A.ifB.unlessC.whether D.that（上海）

2.You willsucceed inthe endyou giveup halfway.2023A.even ifB.as thoughC.as longas D.unless

3.you callme tosay youre notcoming.I11see youat thetheater.（吉林）2023A.Though B.Whether C.Until D.Unless。