分词作插入语
其结构是固定的，意思上的主语并不是句子的主语。
generally speaking 一般说来
talking of (speaking of) 说道
strictly speaking 严格的说
judging from 从…判断
all things considered 从整体来看
taking all things into consideration 全面看来
Judging from his face, he must be ill. 从他的脸色看，他一定是病了。
Generally speaking, dogs can run faster than pigs. 总的来说，狗比猪跑得快。 (speaking 并不是dogs 的动作)
分词作表语
现在分词： 表示主动，正在进行
过去分词： 表示被动，已经完成
She looked tired with cooking. 她由于忙着做饭，看上去有些疲倦。
He remained standing beside the table. 他依然站在桌旁。
分词作补语
通常在感官动词和使役动词之后，如：
I found my car missing. 我发现我的车不见了。
I"ll have my watch repaired. 我想把我的手表修一下。
连词+分词(短语)
有时为使分词短语与主句关系更清楚，可在分词前加连词。 连词有： when，while，if though，after, before, as. 但分词的主语和主句的主语必须为同一个，如：
While waiting there, he saw two pretty girls come out of the building.
waiting 和saw 的主语相同。
分词作状语
As I didn"t receive any letter from him, I gave him a call.
-> Not receiving any letter from him, I gave him a call.
由于没有收到他的信，我给他打了电话。
If more attention was given, the trees could have grown better.
-> Given more attention，the trees could have grown better.
假如多给些照顾，那些树会长得更好。