文档介绍：句。如: Such a clever girl as she can learn anything quickly. I was reading the same book as he bought yesterday. (三)、 as 作介词的用法. 1. 表示好像。如:He dressed asa policeman. 2. 表示作为当作。如: I found a job asa guide. 3. 当某人是某身份时。如: Asa child , she was sent to abroad. 引导的介词短语大多用作状语,as 译为" 作为"; 少数情况可引起宾语补足语。如: Asa Party member, I'll take the lead in everything. ( 状语) She works asa model. ( 状语) She has me as one of her best friends.( 引起宾语补足语) (四)、作副词的用法 1 表示与------ 等同。如: This dress is twice as expensive as that one. 2像, 如等。如: As before, he remained unmoved. 总之,通过以上的分析,我们对 as 的词性和用法有了比较全面的理解和把握,才能在实际的运用中做到心中有数,应付裕如。一、 as 作连词的用法 1. as...as 的用法 as...as 意为"和……一样", 表示同级的比较。使用时要注意第一个 as 为副词, 第二个 as 为连词。其基本结构为: as+ adj./ adv. +as 。例如: (1)This film is as interesting as that one. 这部电影和那部电影一样有趣。(2)Your pen writes as smoothly as mine. 你的钢笔书写起来和我的一样流畅。其否定式为 not as/so +adj./ adv. +as 。例如: This dictionary is not as/so useful as you think. 这本字典不如你想象的那样有用。若有修饰成分,如 twice, three times, half, a quarter 等,则须置于第一个 as 之前。例如: Your bag is twice as expensive as mine. 你的袋子比我的贵一倍。几个关于 as...as 的常见句型: (1)as...as possible Please answer my question as soon as possible. 请尽快回答我的问题。(2)as...as usual/before She looks as pretty as before. 她看起来和以前一样漂亮。(3)as long as... ( 引导条件状语从句) It took us as long as three years to carry out the plan. 我们花了长达三年的时间才完成这项计划。(4)as far as He walked as far as the railway station yesterday evening. 昨天傍