25/3/4 高三英语专题复习（Ⅴ） asas 用法归纳用法归纳as 一词在高中课本中，看起来简单，但用法很多，经常出现，而又不易掌握。主要表现在词性多，词义广，用法灵活。现将其用法归纳如下：Ⅰ. as 作副词，表示程度，意为“同样地”。在“ as…as”, “not as…as” 结构中的第一个 as是副词，作“和 / 与… ( 不 ) 一样”解。 e.g①Jack is as tall as his father. ②He doesn’t speak English as/so fluently as you. Ⅱ. As 作连词，主要引导以下状语从句：1. 引导时间状语从句。与 while 意义相近，强调两个动作同时发生；或某事一发生，另一事立刻发生。 e.g ① He shouted aloud as he ran along. ② I was startled as he opened the door. ③ We get wiser as we get older.2. 引导原因状语从句，与 because 的用法相近。e.g① As it was getting very late, we soon turned back. ② We must stop writing now, as I have rather a lot of work to do. 3. 引导方式状语从句，作“正如，好象，按照”解。主要的句式有 as if(as though);just as;just as…as . e.g① When at Rome, do as Romans do. ② We do farm work as the old peasant teaches us. ③ When a pencil is partly in a glass of water, it looks as if it were broken. ★ ④ As(it is)in your country, we grow wheat in the north and rice in the south. 正如 ( 像 ) 你们国家一样，…… 。 4. 引导条件状语从句。主要句式有： as long as /so long as 只要 e.g As long as you study hard, you will make great progress.5. 引导让步状语从句；作“虽然，尽管”解。这时从句常用倒状语序，即把从句中的表语 , 状语或动词原形放在 as 之前。 e.g① Child as she is, she knows a lot. ★ → Though she is a child, she knows a lot. ② Busy as he is, he insists on studying. → Though he is busy, he … . ③ Try as he might, Tom could not get out of the difficulties. → Though he might try, Tom could not get out of the difficulties. Ⅲ. As 作关系代词1.引导限制性定语从句，...
