(3)while 引导从句时,如果主从句的主语一致,且从句谓语又含有 be, 则从句主语和 be 可以省略。 while 后可直接跟现在分词、名词、形容词或介词短语。 (4)while 引导让步状语从句,常放在句首,意为“尽管”,比 although 或 though 语气轻。 (5)while 引导条件状语从句,意为“只要”,其意思和用法相当于 as long as。while 可位于句首,也可位于句中。 【易错提示】 while 引导时间状语从句时,后跟延续性动词;when 引导时间状语从句时,可以跟延续性动词,也可以跟短暂性动词。例如: ①When/While I was in junior middle school, I liked English very much. 我上初中时非常喜欢英语。 ②When he entered, I was watching TV. 当他进来时我正在看电视(不能用while)。 即境活用16 Tom likes playing chess ________ his sister enjoys playing the piano. A.until B.before C.while D.after [解析]while 用于前后两者的对比转折,意为“然而”。 [答案]C 2.Their personal life was discussed by people who did not know them but talked as if they were friends. 不认识他们的人在谈论他们的私生活,而他们说起来就好像他们是朋友似的。 (1)who did not know them 为 who 引导的定语从句, 修饰先行词 people; as if 在此引导方式状语从句,意为“好像”。 (2)as if/though 引导状语从句时,从句的谓语通常用虚拟语气,表示与事实不符或相反的情况。 【易错提示】 (1)as if/though 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。 (2)与现在事实不符或相反,谓语动词常用一般过去时态(be 用 were)。(3)与过去事实不符或相反,谓语动词用过去完成时态。 (4)as if/though 有时不接从句,而接形容词、分词、副词、不定式或介词短语等,可看作是从句的省略。 即境活用17 When a pencil is partly in a glass of water, it looks as if it ________ broken. A.is |