大恩大德

xǔ duō rén duì dà ēn dà dé wàng ēn fù yì

许多人对大恩大德忘恩负义。

Many people are ungrateful to great kindness.

wàng bù liǎo nǐ duì wǒ de dà ēn dà dé wǒ zhè bèi zi yě bù huì wàng jì nǐ

忘不了你对我的大恩大德，我这辈子也不会忘记你。

I can't forget your great kindness to me, and I won't forget you in my life.