现在分词做伴随状语和过去分做伴随状语区别??

非谓语之分词篇
A.分词作定语
现在分词表“主动又正在进行着”
过去分词表“被动且已经完成了”
generally speaking ,vt.--->-ed作定语；vi---->-ing作定语
but,少数vi. 也可用-ing 分词作定语表状态（eg. an retired worker / a broken window）
but,有些词既有vt. and vi.所以就有两种形式（-ed/-ing）作定语（eg. a developed/developing country)
* 如果分词是一个词的话，一般用前置定语。
分词改定语从句
The apartment （that was）bought last year is now worth more money.
定语（后置，从句……）其他形式，不在此具体讨论。

B.分词作状语（关键找逻辑主语）
a)放在句首的分词往往看作时间状语1以及原因状语2
1. Looking (when I looked) at the picture, I couldn't help missing my middle school days.
2.Seriously injured, Allen was rushed to the hospital.
=As he was seriously injured, Allen was rushed to the hospital.
b)放在句中或句末常常看作为伴随状态(并列句)
The girl was left alone in the room，weeping（crying ）bitterly.
(但注意特殊：Generally/frankly speaking... / taken as a whole(总的来讲）不考虑逻辑主语，看作为独立成分)

C.difference between "being done"&"done"
1）being done---->"又被动，又