You'd be less likely to say "You look tired." or "You look bored." or "You look strange."

但你可能并不会说，“你看起来累极了。”，或者“你看起来很无聊。”，或“你看起来很奇怪。”

You look 课堂 - SpeakingMax英语口语达人

And she's saying "I don't look fine, I'm old, I'm not looking great. I'm really tired."

她说，“我看起来很不好，我年纪大了，也不再美丽了。我真的很疲劳。”

You look 课堂 - SpeakingMax英语口语达人

But you look really tired.

但你看起来非常疲劳。

It sounds like 实战 - SpeakingMax英语口语达人

You look pretty tired.

你看起来好像很累。

You look 课堂 - SpeakingMax英语口语达人