第十三讲 高中英语语法 状语从句讲解与练习

状语从句 状语从句在句中作状语，可分为：时间、条件、让步、原因、目的、结果、地点、比较、方式状语从句。 1、 时间状语从句 引导时间状语从句的连词有：when, as, while, until, not…until, before, after, since, the minute, the moment, each( every, next, the first) time等。时间状语从句中一般用一般现在时或一般过去时。 1． when , while, as都可解释为“当```的时候”但侧重点有所不同。 1) When后既可以接短暂性动词，也可以接延续性动词 ，表示从句动作与主句动作同时发生 When I arrived home , I had a little rest. 2）As 除了表示“当```的时候”，还可表示为“一面```一面”，“随着” He sang as he danced.(一面```一面) You will grow wiser as you grow older.(随着) 3)While表示“当```的时候”强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。 While we were working, they were having a rest. While (they were) having a discussion, they got very confused. 注意：while 有对比的含义，解释为“然而”。eg: I prefer black tee, while he likes coffee. 2． until, not…until表示“直到`才”,在肯定句中主句常用延续性动词；在否定句中常用短暂性动词。 肯定句：I waited until midnight. 否定句：I did not leave until midnight. 注意点：1）not until…在句首，主句用倒装 Not until you had explained how did I manage to do it. 2) It is not until…that…引导的强调句 It was not until it was dark that he came back. 3．