当我们在英语课上有的疲倦时,他就教我们唱首英文歌英文翻译
问题描述：
当我们在英语课上有的疲倦时,他就教我们唱首英文歌英文翻译
答
He teaches us to sing English songs when we are tired in English class sometimes.
答
He teached us to sing an English song to make us comfortable when we had an English class .