重点句型 考点七 while的用法 [基础过关]1) 引导时间状语从句.表示“当-时候.与---同时 .主句一般用进行时态, 2)引导让步状语从句.表示“尽管 语气较轻, 3)后面直接跟现在分词.过去分词或介词短语.形成省略句.这种省略的条件是.前后主从句主语必须一致 He broke in the house while we were talking. 当我们正在谈话时.他闯了进来. While it is very cold today, we decide to go out for a walk. 尽管今天天气很冷.我们还是决定出去走走. You had to be very cautious while driving. 你开车的时候必须很小心 [典型例题] the Internet bridges the distance between people, it can bring a lot of social problems. A. While B. If C. Once D. When [答案]A 考查连词用法. [点拨]按照句意此处为“尽管 之意.是让步状语.只能用while引导. 考点八 as if/though 引导的状语从句 [基础过关]“好像.似乎 ,作连词后可跟从句.分词.形容词等.引导从句时常用虚拟语气.表示与事实不符或相反的情况. He spoke in that way as if he were a foreigner. 他讲话的方式就好像是老外. [拓展延伸]1)与现在事实不符或相反.谓语动词常用一般过去时. 2) 与过去事实不符或相反.谓语动词常用过去完成时. 3)有时不接从句.而接分词.形容词.副词.不定式.介词短语等.可以看成是省略的句子. [典型例题] He held his pen as if he what to write. A. has known B. had known C. knew D. known [答案]B 考查as if/though从句的用法. [点拨]由主句是一般过去时.推出从句虚拟语气为过去完成时. [实战演练] 【查看更多】
