They have all been put to shame by a boy who,while playing truant,travelled 1600 miles.句子成分
问题描述：
They have all been put to shame by a boy who,while playing truant,travelled 1600 miles.句子成分
He hitchhiked to Dover and,towards evening,went into a boat to find somewhere to sleep.句子成分结构分析
答
a boy who travelled 1600 miles while playing truant
这样改一下你可能 就清楚了
定语从句who travelled 1600 miles while playing truant
travelled是从句中的谓语动词, 这里本身就是主动的,
while playing truant = while (he was) playing truant
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