语法重点复习---虚拟语气既定模式中的虚拟语气：A.由if构成的虚拟语气:If引导一个条件句,含义为”如果/假如…”(在宾语从句中=whether”是否”时除外)可以用来表示两种条件:可实现的假设条件(这种假设只可发生在将来,即:说话之后),此时,if从句被称为:真实条件句,其引导的主从句的时态对应关系如下:if+SA+P(仅用一般现在时或am/is/aregoingtodo;am/is/aretodo=want/plantodo),SB+P(一般现在/一般将来)(2)不可实现的假设条件,即,虚拟条件.这种假设可以针对:现在(说话时及目前阶段);过去(说话前)及将来.但都无法实现.此时,if从句与主句的时态对应关系如下表所示:假设情况If从句中的动词形式主句中的动词形式对现在S+P(一般过去时/be动词常用were)S+P(would/should/could/might+be…/dosth/bedone)对过去S+P(过去完成时:hadbeen…/haddonesth/hadbeendoneS+P(would/should/could/might+havebeen/done)对将来S+P:(1)一般过去weretodoshouldbe…/dosthS+Pwould/should/could/might+be…/dosth例:Ifthey_________(get)tothebookingofficeearlier,theywouldhavegotsometickets.Ifyou__________(make)thesamemistakelater,youwouldbepunished.Ifthedoctor____________(send)forwithoutdelay,theboywouldstillbealive.Ifhe______________(receive)threemorevotes,hewouldbeourprincipalnow.掌握方法:判断if从句是真实还是虚拟句判断所假设的的情况的所在时间区域背熟主,从句的时态对应关系记忆技巧:条件句中的时态比虚拟情况早一个时态!B.用wish或ifonly引导一个从句表示一种无法实现的愿望:要是…就好了/旦愿…从句时态变化如下现在无法实现过去无法实现将来无法实现(sb)wish(that)ifonlyS+P(一般过去时)be动词常用wereS+P(过去完成时)S+P:wouldcould/might+be…/dosth/bedone注意:wish与hope的区别:hopethat从句表示一个可以实现的愿望hope不可用于:hopesb+sth(祝福语)的表达!二.特定词汇后面的虚拟语气:A.特定动词后面的that从句中的非假设性虚拟:建议suggestadviserecommend(that)S+(should)+be…do…bedone命令ordercommand同上请求demanddesirerequestrequireinsisturge同上注意:(1)当suggest的主语为sth时,其含义为暗示/表明;后面的从句用正常形式(2)当insist的含义为:坚持说/坚持认为/坚持表白时,后面的从句用正常形式B.特定名词后面的that从句(同位语从句)中的非假设性虚拟:建议suggestionadvicerecommendationthatS+(should)+be…do…bedone命令ordercommand同上请求demanddesirerequestrequirement同上C.特定形容词后面的that从句中的非假设性虚拟:It+is(be)importantstrangenecessaryessentialdesirablenaturalthatS+(should)+be…do…bedone三.固定句式中that从句后的虚拟语气:A.Itis(high,right)time(that)+S+P(一般过去时/shouldbe…/do…;should不可省)Itistime(that)you________(go)tobed.B.(1)sbAwouldrathersbB+P(一般过去):对现在或将来情况;A希望/旦愿B(现在/将)…就好了.I’dratherhe________(be)presentatthis/tomorrow’sconference.(2)sbAwouldrathersbB+P(过去完成时):对过去情况;A希望/旦愿B那时/曾…就好了.I’dratheryou____