but I'm not listening while doing my make-up.
　　　
In class Mary was looking at a samll mirror while combining her hair and doing her make-up. The teacher noticed and commented, "you shouldn't do your make-up while listening to class."
Replied Mary, " but I'm not listening while doing my make-up."

可我化妆时没听课呀

课堂内，玛丽对着一个小镜子束发，化妆。 老师发现了，说：“你不应该听课时化妆。”
玛丽回答说：“可我化妆时没听课呀。”