Making Faces
做鬼脸
Finding one of her students making faces at others on the playground, Ms Smith stopped to gently reprimand the child.
史密斯小姐发现她的一名学生在操场上向别人做鬼脸，便去轻责他。
Smiling sweetly, the Sunday school teacher said, "Bobby, when I was a child I was told if I made ugly faces, my face would freeze and stay like that".
这位主日学校的老师甜甜地微笑着，说："博比，我小的时候，有人告诉我如果我做鬼脸，我的脸就会僵硬，永远都那么丑。"
Bobby looked up and replied, "Well, Ms Smith, you can't say you weren't warned."
博比抬头看了看老师，说："史密斯小姐，你可别说没人警告过你啊。"

1.making Face
make a face是做鬼脸,
make faces是扮鬼脸.
其实两个短语完全一样。单数第三人称也可以用make faces。不过相比而言后者更吓人了，而且一般含有贬义的意义，所以文章标题才选用了后者。
如：He always makes faces so as to make everyone laugh. 他总是做鬼脸逗所有人笑。

2.reprimand
n.训斥；惩戒；谴责
vt.谴责；惩戒；责难
eg：Be firm and reprimand your pet severely. 要坚决，严厉斥责你的宠物。

3.warn
warn sb. (not) to do sth.警告某人（不要）干某事
warn sb. about sth.提醒、警告某人注意某事
warn sb. against (doing)sth.警告某人某事