1.条件状语
（1）Given more time we could do it much better.
作条件状语相当于if/unless引导的条件状从。
If we were given more time…
2.时间状语
Asked why he was late,the boy made no answer.
作时间状语相当于when/while等引导的时间状从。
When he was asked why he was late,the boy made no answer.
3.原因状语
Encouraged by the teacher’s words, he went on with his research work.
作原因状语相当于as/since/because引导的原因状从
Because he was encouraged by….
4.让步状语
Laughed at by many people,
he continued his study.
作让步状语相当于though/although/even if引导的让步状从。
Though he was laughed at by…
5.方式或伴随状语
The old man went into the room,supported by his wife.
Seated at the table,my father and I were talking about my job.
The teacher stood there surrounded by many students.(表伴随，无连词相通）
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