Unit3Understandingeachother●GrammarandUsageStep1:GeneralintroductionThegrammaritemsinthisunitfocusonunrealconditionals.Unrealconditionalsareusedtoexpressaconditionorsituationthatisnotrealorisimaginary.Youshouldpayattentiontotheformsofthepredicateverbsindifferenttenseswhenyouusesentencesinunrealconditionals.Youareexpectedtouseunrealconditionalsandhowtouseunrealconditionalscorrectly.Step2:Explanation1.Readthefollowingsentences.Ifmyhusbandhadn’tbeencaughtintherain,hewouldnothavegotafever.NothingwouldhavehappenedtohimifhehadnotvisitedhisfriendonSaturdayIfIwereyou,IwouldnothavevisitedthefriendonSaturday.Intheabovesentences,whathasbeensaidisunreal.Theverbformslikethesecanalsobecalledthesubjunctive.Canyoufindoutinwhatcasestheunrealconditionalsareused?Andcanyousaythesentencesinanotherway,notusingtheunrealconditionals?Sampleanswers(1)Myhusbandwascaughtintherain,sohegotafever.(2)HevisitedhisfriendonSaturday,sosomethinghappenedtohim.(3)Iamnotyou,soIvisitedthefriendonSaturday.2.ReadPoint4toseehowtoformunrealconditionalsofthepresent,pastoffuturetime.Usethethreestructurestotranslatesomesentences.(1)如果我是一个学生，我将更加努力地学习。(2)如果你昨天去听音乐会的话，你将会遇到她了。(3)如果明天下雨的话，会议将会推迟。Sampleanswers(1)IfIwereadoctor,Iwouldsaveherlifewithouthesitation.(2)Ifyouhadgonetotheconcertyesterday,youwouldhavemether.(3)Ifitrainedtomorrow,themeetingwouldbeputoff.3.PleasereadPoint3andyouwillfindoutonlyshould,wereorhadcanbeusedintheinversion.Changethefollowingsentencesintotheirnormalorderandcomparethedifferencesbetweenthetwotypesofsentences.(1)Shoulditraintomorrow,wewouldnotgoouting.(2)Hadyoucomeearlier,youwouldhavemetmysister.(3)Wereyoutotakethetrain,youwouldbetheremuchsooner.Answers(1)Ifitshouldraintomorrow,wewouldnotgoouting.(2)Ifyouhadcomeearlier,youwouldhavemetmysister.(3)Ifyouweretotakethetrain,youwouldbetheremuchsooner.Forreference动词的语气——虚拟语气一、语气的定义和种类l、语气：语气是动词的一种形式，它表示说话人对某一行为或事情的看法和态度。2、语气的种类：(1)陈述语气:表示动作或状态是现实的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句。如：Wearenotready.我们没准备好。Whatafinedayitis!多好的天气啊!(2)祈使语气:表示说话人的建议、请求、邀请、命令等。如:Openthedoor,please。请打开门。(3)虚拟语气:表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。如:IfIwereyou,IshouldstudyEnglish.如果我是你，我就学英语了Mayyousucceed!祝您成功！二、虚拟语气在条件从句中的用法条件句有两类，一类是真实条件句，一类是虚拟条件句。如果假设的情况是有可能发生的，就是真实条件何。在这种真实条件句中的谓语用陈述语气。如:Ifitdoesn’traintomorrow,wewillgotothepark.如果明天不下雨，我们就去公园。如果假设的情况是过去或现在都不存在的，或将来不大可能发生的，则是虚拟条件句。如:Ifhehadseenyouyesterday,hewouldhaveaskedyouaboutit.如果他昨天见到你，他会问你这件事的。(事实上他昨天没见到你，因此也未能问你这件事。)在含有虚拟条件句的复合句中，主句和从句的谓语都要用虚拟语气。现将虚拟条件从句和主句的动词形式列表如下:从句主句与现在事实相反动词的过去式（be的过去式一般用were）would/should/could/might+动词原形与过去事实相反had+过去分词would/should/could/might+have+过去分词与将来事实相反动词过去式，should+动词原形，wereto+动词原形would/should/could/might+动词原形注:主句中的should只用于I、we，但在美国英语中，should常被would代替；从句中的should可用于各种人称。l.表示与现在事实相反的假设和结果。如...
