优质解答
简单说有三种：to -ing,-ed 分别表示：未发生的动作,
I have a lot of work to do. 我有许多事要做.
ING表示正在进行或者主动动作,：
现在分词短语可以表示一个同时发生的次要的或伴随的动作：
Following Tom,we started to climb themountain.
现在分词短语还可以表示原因,相当于一个原因状语从句：
Not knowing her address,we couldn’t get in touch withher.
现在分词短语还可以表示时间,相当于一个时间状语从句：
Hearing the news,they all jumped with joy.
Returning home,he began to do hishomework.
过去分词表示 完成的动作或者被动：
Seen from the hill,the citylooks magnificent.
Given good health,I hope to finish thework this year.
作宾补：过去分词也同样可以作宾语的补语,接在某些动词后面
I will have the clothes washed tomorrow.
希望对你有用
简单说有三种：to -ing,-ed 分别表示：未发生的动作,
I have a lot of work to do. 我有许多事要做.
ING表示正在进行或者主动动作,：
现在分词短语可以表示一个同时发生的次要的或伴随的动作：
Following Tom,we started to climb themountain.
现在分词短语还可以表示原因,相当于一个原因状语从句：
Not knowing her address,we couldn’t get in touch withher.
现在分词短语还可以表示时间,相当于一个时间状语从句：
Hearing the news,they all jumped with joy.
Returning home,he began to do hishomework.
过去分词表示 完成的动作或者被动：
Seen from the hill,the citylooks magnificent.
Given good health,I hope to finish thework this year.
作宾补：过去分词也同样可以作宾语的补语,接在某些动词后面
I will have the clothes washed tomorrow.
希望对你有用