Happened
v. 发生（happen的过去式, 过去分词）
🗣️ 情景例句
I'm ten.
十岁。
That street is only two miles long.
那条街仅仅是2英里长的。
Two of his assistants had been working busily since eight o'clock and had only just finished.
他手下两名店员从早上8点就开始忙碌，这时刚刚布置完毕。