例句： Walking along the street， I saw a high building.(walking和saw的动作几乎同时发生)
分析： 该句是简单句。分词短语Walking along the street在句中作状语，表示时间，相当于when I was walking...。
译文： 当我沿着马路走时，看见一座高楼。
例句： Having done his homework， the boy went to bed with his little brother.(having done 在went to的动作之前已经发生)
分析： 该句是简单句。分词短语Having done his homework在句中作状语，表示时间，相当于after the boy had finished...。
译文： 做完作业后，小男孩和他弟弟一起睡觉。
二、分词的用法(Usage)
(一)充当定语
分词常用来修饰名词或代词，单个分词作定语放在所修饰词之前，分词短语作定语放在所修饰词之后;但有些过去分词也可放在所修饰词之后，分词短语作定语置于句中时相当于一个省略关系词的定语从句。
例句： How many of us attending(=who are attending)， say， a meeting that is irrelevant to us would be interested in the discussion?
分析： 该句是复合句。主干部分为How many of us would be interesed in the discussion。 that is irrelevant to us是修饰a meeting的定语从句， say作插入语，可译为“比方说”， attending... a meeting作定语修饰us。
译文： 假如我们参加了一个与我们无关的会议，有多少人会对讨论感兴趣呢?
例句： It is easy to blame the decline of conversation on the pace of modern life and on the vague changes taking place(=which takes place)in our ever?changing world.
(1999年第3题)
分析： 该句是复合句。it是形式主语，to blame the decline of...是真正的主语，分词短语taking place in our ever?changing world修饰changes。
译文： 人们很容易把交谈减少归咎于现代生活的节奏以及在我们这个不断变化的世界中所发生的某些不太清楚的变革。
例句： On the other hand， he did not accept as well founded the charge made by some of his critics that， while he was a good observer， he had no power of reasoning.
