资源描述：
《conditionals语法讲义》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Conclusions:TypePatternExampleUseType0If…present…+maincl…presentIfthedoorbellrings,thedogbarks.1.Forahabitualactivityorsituation2.FortheautomaticresultofapossiblefutureactionType1If…+present(will)…+maincl…+willIfwedon’thurry,wewillmissthebus.Ifyou’llwait,I’llhelpyou.Es:intheif-cla
2、use,wecanusewill,othermodalverbsType2If…+past…+maincl…+wouldIfIhadmuchmoney,Iwouldtravelroundtheworld.Thepasttenseexpressesanunrealorhypotheticalcondition.Type3If…+pastperfect…+maincl…+would+perfectIfyouhadtoldmeaboutthisproblem,Iwouldhavehelpedyou.Weusethepastperfecttotalkaboutwh
3、atdidn’thappen,torefertosomething,unrealaction.关于条件句的几点补充说明：1.条件句中的would有时可用could/might/should等代替，均带有本身的情态动词意义。Wecouldhavepreparedbetterifwehadgotmoretime.Ishouldn’thavegivenhimtheoperationifithadn’tbeennecessary.2.条件句中的条件有时不用if表示，而借助于其他某些词语或句子结构。Withouttom’stheory(=iftherehadn’tb
4、eentom’stheory),wecouldn’thavebecomesosuccessful.United,wearestrong;divided,weareweak.(=ifweareunited….;ifwearedivided,…)3.有些条件句形式上是表示虚拟的动词句型，实际上并不是表示虚拟含义，而是作为一种婉转口气，或是表示惊讶等情绪。有的语法书将这类条件句划作真实条件句。条件句主句句型AWould+不定式(=bewilling+不定式)Would+不定式(=will+不定式)(表示将来的可能性)句型BShould+不定式(一般将来含义)(相
5、当于一般现在时形式)Would+不定式(will+不定式)(表示将来的可能性)Eg:IfyouwouldgoboatingontheAiXilake,youwouldenjoyit.(A)Ifyoushouldprunethesetreesandbushes,Icertainlywouldbepleased.(B)IfIshouldseehim,Iwillbringyourwordtohim.(说明自己不一定能见到他,带有委婉推辞之意）Ifyoushouldseehim,pleaseletmeknow.（说话人估计对方可能会见到他，但是故意留有余地，显得客
6、气一点）Wouldyoumindifhestayedhere?（很有礼貌的征求别人同意）StrangethatIshouldhavebelievedalittlechild!（表示自己都很奇怪）Should,will,would,wereto在条件从句中的情况（有些语法书上称之为type2、3条件句的变体形式）Ifitshouldrainagain,theflowerswillbloom.Ifheshouldcometomorrow,Iwouldtellhimeverything.IfIshouldbedetained,starttheprogramwit
7、houtme.在这里should仅仅表示一种不太肯定的婉转语气，并不影响条件的真实性Ifmyfatherwillgivemepermission,Ishallspendafewmonthsabroad.Ifyouwillacceptthenomination,alotofelectorswillvoteforhim.Ifhewillwaitforafewmoreminutes,thedoctorwillseeyouwithoutyourmakinganappointment.在if-分句中用“will+do”并不单纯的表示将来意义，这里的will是个表示“
8、意愿”的情态动词，相当于bewillingtoAttention:
