介词"by"前通常接动词被动式中的过去分词,构成被动语态,如"The book was written by him。";也可接动名词表示方式手段,如"by studying hard";或在不及物动词后引出执行者,如"The door was opened by me。"其前置词需依具体语法功能而定。

介词"by"前通常接动词被动式中的过去分词,构成被动语态,如"The book was written by him。";也可接动名词表示方式手段,如"by studying hard";或在不及物动词后引出执行者,如"The door was opened by me。"其前置词需依具体语法功能而定。