Your time could be usefully employed in attending night classes.

你的时间可以被有效地利用来上夜课。

《柯林斯英汉双解大词典》

How long have you been attending night classes?

你上夜校有多久了？

youdao

She did a year's work a term and went to night classes.

她一个学期学完一年的课程，晚上去上夜校。

youdao

rent extra classroom space; and offer night classes running as late as 2:30 in the morning, just to fit everyone in.

VOA: standard.2009.12.14

Long classes from, in the morning till at night.

从早上到晚上，一直都在上课。

学习外语的原因 - SpeakingMax英语口语达人

Additionally, my client, a software engineer took night classes to expand her own capacity.

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Though she was a ninth-grade dropout, in 1961 she enrolled in night classes to become a medical assistant.

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You can now keep your PC in trim without needing night classes.

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