I think it must be you.

谅必是你。

《新英汉大辞典》

I think he must be cracked, don't you?

我认为他一定是疯了，你说是不是？

《牛津词典》

You must be starving, you poor things.

你们一定是饿坏了，你们这些可怜的家伙。

《牛津词典》

But you must be careful. It is easy to get lost in the waves of moving sand especially during sandstorms.

VOA: special.2010.01.04

If you want to say,no,no,no,those memories are illusions, it must be because you don't think he's really Napoleon.

假如你说，不，那些记忆都是错觉，那是因为你不认为他是真的拿破仑。

耶鲁公开课 - 死亡课程节选

Aha! So to study and grasp things about dead bodies, corpses, you must yourself be a dead body.

所以为了研究并掌握关于尸体的知识,你自己必须先是一具死尸

耶鲁公开课 - 死亡课程节选

Sweeping our country right now is a wild contagion of charge and counter-charges about who should be president and the kind of person you must be if you do not agree with me.

FORBES: Connect

"Whether it comes after the surgery or it's just on its own, that must be done and you must be tested throughout the two years, " Hunt said.

CNN: First transgender MMA fighter goes public

Someone, anyone, offering you a free service online must be selling you, or your time, your interest, to someone else.

FORBES: Facebook Is Free Therefore It Is You Getting Sold