虚拟语气1.概念虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。2.在条件句中的应用条件句可分为两类
非真实条件句时态：可以表示过去，现在和将来的情况。它的基本特点是时态退后。a.同现在事实相反的假设。句型：条件从句+主句一般过去时：should(w
混合条件句主句与从句的动作发生在不同的时间，这时主，从句谓语动词的虚拟语气形式因时间不同而不同，这叫做混合条件句。If you had asked him yesterda
虚拟条件句的倒装虚拟条件句的从句部分如果含有were、should、或had可将if省略，再把were、should或had移到从句句首，实行倒装。Were they here now, they could hel
besidesexceptexcept forexcept thatbutbut for besides除t know Peter except that hes an Japanese.Theres nothing but a chair in the room.But for your help，I wouldnt have finished my homework.注意
understand.A比B(高，长s getting healthier and stronger than his brother.表比s less rich than he.表与其说，不如s more than a teacher.Shes more than tired.表并不比某某s no taller than
Your boyfriend told you.过去将来时态 should+v.原/would+v.原表过去预计将要发生的动作或存在的状态。常用于从句或引语中 常用于状语从句、名词性从句或间接
【名词性从句】概念在句子中起名词作用的句子叫名词从句 (Noun Clauses)。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同
名词性that-从句1)由从属连词that引导的从句叫做名词性that-从句。That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性tha
名词性wh-从句由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who、whom、whose、whoever、what、whatever、which、whichever等连接代词和where、when、how、why等