我错怪了他。
Wǒ cuòguài le tā.
I misjudged him.
我写错了他的名字。
Wǒ xiě cuò le tā de míngzi.
I wrote his name wrong.
不好意思,我认错人了。
Bù hǎoyìsi, wǒ rèncuò rén le.
Sorry, I thought you were someone else.