请问一下这个问题!You should spend a resonable amount of time relaxing and exercising.请问relaxing and exercising.是什么用法啊,是分词做目的状语吗?请详细解释一下!

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请问一下这个问题!
You should spend a resonable amount of time relaxing and exercising.
请问relaxing and exercising.是什么用法啊,是分词做目的状语吗?
请详细解释一下!

a reasonable amount of是修饰time的 固定用法spend time doing sth.
relaxing和exercising是并列的