students spend five minutes in an discussion evaluating their class performance today.
本句子中的evaluating 是什么用法,非谓语动词的 什么用法,并给出类似用法的几个例句,谢谢
原句子为:In one English class, the 11 students spend the last five minutes in an energetic exchange evaluating their class performance for the day on 1-10 scale.