Sometimes, in an impulsive moment, I pretend not to understand an everyday expression or something in the textbook, and ask him to be the teacher and explain it to me.
有時心血來潮，我假裝不懂課文所教的或平常用語，請孩子當我的小老師，而我坐在白板前面的桌椅，乖乖的當他的學生。