文档介绍：虚拟语气的几种特殊用法省掉if的条件从句结构:Hadyouaskedme,Iwouldhavetoldyou.   (=Ifyouhadaskedme,…)、分词、介词、名词、连接词或定语从句来表示,如:Atruefriendwouldnotdosuchathing.(=Ifhewereatruefriend,he...)(=Iftherewerenowater,…)(=Ifyouhadn’thelpedme,…)例句:Withoutyouradvice,ourmeetingwouldn’essfully.[过去] (=>可转换为:Iftherehadn’tbeenyouradvice,we…) Yournotesarealmostillegible(难以辨认的).Notestypedoutwouldbealoteasiertoread.[将来] (=>可转换为:Ifthenoteshadbeentypedout,itwouldbealoteasiertoread.) .[过去] (=>可转换为:,he..) 3.    有时条件从句中的动作和结果从句中的动作发生的时间不一致,如:Ifhehadfollowedthedoctor’sadvice,,、虚拟语气的其他用法1、Suggest,advise等动词之后宾语从句须用虚拟语气,其句子结构如下:suggest,advise,mend,demand,require,insist,urge,request,order,      +that…(should)+动词原形devide,ask,move,propose等注意:在此结构中that不可省略;should省不省均可。Hesuggestedthatthey(should),that引导的从句仍用虚拟语气。Hemadearequestthatthey(should),也可用陈述语气。、Itis(was)+necessary,apity等+that引导的从句须用虚拟语气,其句子结构如下:         imperative,advisable,                      动词完成式Itis(was)+important,natural,necessary,+that…(should)+essential,strange,等                         动词原形      Itisimportantthatyou(should)followthedoctor’、wish的用法动词过去式或were—与现在事实相反主语+wish(that)+主语+  动词过去完成式—与过去事实相反助动词过去试+动词原形—