Happened
v. 发生（happen的过去式, 过去分词）
🗣️ 情景例句
Is this your very first advanced aerobics class?
这是你第一次上有氧运动高级班吗？
It's nothing. Don't mention it.
区区小事，何足挂齿。
He goes to Chinese classes every week.
他每周都要去上汉语课。