九年级英语专题复习学案- 连词九年级英语专题复习学案-连词1、 从属连词的用法表示关系 作用示 例引导宾语状语从句That ,if/whether引导时间状语从句when,while,as,since,before,after,as soon as,until/till引导条件状语从句if ,unless引导原因状语从句because , since , as 引导让步状语从句Though,although,even if, howeven引导结果状语从句连接复合句Sothat;suchthat引导比较状语从句asas,than,morethan引导目的状语从句(so)that , in order that 2、 并列连词的用法表示关系作用例 词并列关系and,bothand,neithernoras well as ,not onlybut also转折关系but, while ,only, or选择关系or, eitheror因果关系连接作用for, then, so3、 相似连词辨析序号相似连词 辨 析 例 句作“ 是否 ”讲，引导 Do you know 宾语从句，常互换 if/whether our teacher will come to the party?在介词之后，动词不定式之前或 or 在之前，只用 whetherI cant decide whether to go or not.1if/whetherif 还作“如果 ”讲，引导条件状语从句If Joan comes,Ill tell you as soon as possible.Im so tired that I cant walk any farther.He is so tall a boy that he is good at basketball.sothatso 为副词，修饰形容词或副词“so+形容词”后也可跟单数可数名词如果名词前有形容词many,much,few,little等修饰,用 soThere are so many people in the room that it is very noisy.2suchthat such 为形容词，修饰名词It was such a warm day that we all went swimming.三者作“当时 ”讲，引导时间状语从句，表示一段时间时可以互换（从句动词用延续性动词）When/While/As we was looking for her watch,she just stood there.表示一点时间时，when 和 as 可互换（从句动词为终止性动词）Dad was having supper when/as I got home.3when/while/as如果 when 在意义上与 before 或 after相当，则不用while,asThe film had begun when we arrived.