我好累呀用英文怎么说

"I'm tired" 是表示自己很疲倦的常用句型。它来源于英语的基本语法结构，表示主语+动词+表语的句型。

例句：

I'm tired. (我很累。)
He's tired from working all day. (他因为整天工作而疲倦。)
She's so tired that she can't keep her eyes open. (她太累了，眼睛都睁不开。)

注意："tired" 也可以用于形容词形式，例如： "He looks tired." (他看起来很累。)