状语主要是用来修饰动词和形容词的,以表明动作发生或状态存在的时间,地点,原因,等.
1Tenyearsago,ShebegantoliveinDalian.
时间状语修饰began
2Theboywaspraisedforhisbravery.
原因状语修饰waspraised
B状语从句就是用一个句子来代替上面的时间状语和原因状语.
1Tenyearsago,shebegantoliveinDalian.
Whenshewas12yearsold,shebegantoliveinDalian.
2Theboywaspraisedforhisbravery.
Theboywaspraisedbecausehesavedthebaby’slifeinthefreezingriver.