大学英语自学教程（下册）语法 一、as的用法 as一词在英语中用法比较复杂。从词类上讲，as可以用作介词、副词、连词、关系代词。从语法功能上讲，as可以和它的宾语一起构成介词短语，可以引导状语从句、定语从句，也可以修饰形容词或其他副词。另外，as还可以用在很多习语中。 一、as用作介词 1.as用作介词时有两个基本词义。一个是“作为、担当”；另一个是“似、像”。例如： The actor who appeared as Romeo was his good friend. 扮演罗密欧的演员是他的好朋友。 He worked as a teacher in that school. 他在那所学校任教。 as用作介词时要注意与介词 like的异同。as意为“似，像”时与介词 like通用。但是当 as用来表示“作为、担当”的意思时，与介词 like有区别。请比较下面的例子： She spoke as a lawyer. 她作为律师讲话。 She spoke like a lawyer. 她像律师一样说话。（她并不是律师） 2.由 as引出的介词短语在句子中可以作状语、定语、宾语补语和表语。 (1)状语 The nation rose as one man against foreign aggression. 全国人民团结一致，起来反对外来侵略。 As a newspaper reporter, he is naturally very much interested in the hero. 作为一个新闻记者，他自然对这位英雄很感兴趣。 (2)定语 You are to be responsible for the work as a whole. 你要对整个工作负责。 He has got a position as teacher of English. 他得到了一个英语教师的工作。 (3)宾语补语 We regard him as a shining example for us to learn from. 我们把他看作学习的光辉榜样。 They have chosen "Essential English" as their textbook. 他们把《基础英语》选作教材。 (4)表语 The world is as a stage. 世界好比舞台。 He works as an engineer in a factory. 他在一家工厂里当工程师。 (5)宾语补足语 He was a guest and was treated as such. 他是客人，也确实被当作客人款待。 二、as用作副词 as用作副词可以表示程度，主要用在 as…as结构中。此时 as的意思为“如同，像”例如： His face is as black as coal. 他的脸像煤一样黑。 John behaves as politely as Bob. 约翰和鲍勃同样彬彬有礼。 要注意的是在上面两个例句中。第一个 as是副词，第二个 as是连词。as作...
