状语从句（优）.ppt

状语从句 大连市第八中学 孙君 高级教师 Unless you work hard, you will fail, You can go out, as long as (so long as ) you promise to be back before eleven. In case I forget, please remind me about that. 注意：条件状语从句中的谓语动词的时态不可用将来时，只能用现在时态或过去时态表示将来时。 7、方式状语从句： 由连词：as, as if, as though引导： The teacher told the students to do as he did. Leave it as it is. He heard a noise, as if someone was breathing. I saw the man looking about him as if he wished to impress upon his mind everything. as if和as though意义和用法大致一样，引导的从句多用虚拟语气，但也可用陈述语气。 He treats me as if I were his own son. He walked as if he were drunk. * 2003年名师课堂辅导讲座—高中部分 1、本讲内容：学习状语从句。 2、学习要求： （1）掌握状语从句的种类。 （2）学会引导状语从句的从属连词。 3、学习指导： （1）本讲重点：状语从句的种类。 （2）本讲难点：从属连词之间的区别。 4、典型例题解析： 状语从句在主从复合句中修饰主句中的动词，形容词或副词，按意义可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。从句的位置放在句首，也可放在句末。放在句首时，从句后面常用一个逗号，放在句末时，从句前一般不用逗号。 1、时间状语从句： 引导时间状语从句的从属连词有：when, while, as, whenever, before, after, since, till, until, as soon as, once…等引导。如： When he was still a young man, he was forced to leave his homeland for political reasons. It has been 15 years since he left. I’ll tell him the news as soon as I see him. Once you have got used to it, you will like it. I waited till he had finished his work. 注意： （1）when, as, while when即可引导持续性动作，又可引导短暂性动作。它可以表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。如： When I was a boy, I used to go to the seashore on Sundays.（同时） When the lesson was over, we began our writing. （从句动作在前） as引导持续性动作，侧重主句和从句的动作同时发生。 He hurried home, looking behind as he went. I saw your sister as she was getting on the bus yesterday. He sang as he walked. While：指的是“在某一时间里”，“在… 期间”，从句里的动作必须是 持续性的，它也强调主句和 从句动作的同时发生，往往 侧重主句和从句动作的对比。 如： While he was in London, he studied music. While we were watching TV, he was writing a composition. while也可做并列连词，表示对照的意思。如： He is tall while his brothe