假如你是李华，你的朋友王明最近做了一件对不起你的事或说了一句伤害你的话，但王明自己似乎并未意识到。

找个时机和他聊天时当笑话讲个他听，如果他有心就会改正了。

Dear Wang Ming,
You may remember that the other day in the presence of my classmates you referred to my constant failures in my English exams before you helped me with my lesson. Recently, they have been making jokes about that and I can't take it any more.
You may not be aware but I must tell you that it hurt me a lot. I admit that I owe many thanks to you for my improvement in English but it doesn't mean you have the right to emphasize my failures before others. What's more, I believe on should help their friends but not boast about being helpful.
I hope you will avoid that topic in future when taking with others and we will still be friends. Otherwise, I'm afraid our friendship will be deeply hurt.
Yours,
Li Hua

打斯我哒，不知道能不能帮上你。你再检查一下，有没有语法错误。
这篇作文我们写过，这个是我背的范文，也不知道有没有记错的地方，检查一遍再抄吧......

提醒对方明白其做的事情或说的话对你的伤害

明白