人教高中英语语法复习状语从句讲解与练习(含答案）.doc

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。
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。
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.
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．Hardly/scarcely…when, no sooner…than, as soon as表示为“一```就```”
I had hardly/scarcely got home when it began to rain.
I had no sooner got home than it began to rain. It began to rain as soon as I got home.
二 条件状语从句
条件状语从句分为两大类：真实条件句（主将从现）和虚拟条件句（虚拟语气）。引导条件状语从句的连词有：if, even if/though, unless/ if …not, as long as/ so long as, as far as/so far as, provided/providing (that), on condi