牛津英语8B Unit 2 Reading 出现了这样一个句子：The performers all wore different costumes and waved to people while they marched across the park, singing and dancing all the way.
while 引导的从句中为何用过去时，是不是因为后面的singing and dancing all the way这个伴随状语？

看来你的书教的很仔细呀