I must be the happiest person on earth !

我一定是世界上最幸福的人！

《牛津词典》

He seemed to know intuitively that I must be missing my mother.

他似乎凭直觉知道我一定是在思念我的母亲。

《柯林斯英汉双解大词典》

'I must be crazy,' she thought.

“我准是疯了。”她想。

《牛津词典》

She wrote "I Must Be Saved" to honor the folk singer Odetta whom Peyroux calls her spiritual grandmother.

VOA: special.2009.07.10

And even though it's fairly obvious what's doing that, they still misattribute that arousal to " "I must be falling in love," even with that obvious a--even with that obvious an instruction.

即使引起这些反应的原因非常明显，他们还是会产生性错觉,“以为这是爱的力量“,即使很明显，这是由于痛击实验引起的紧张。

耶鲁公开课 - 心理学导论课程节选

I wish I had more time, but I must be going.
I wish I had more time, but I must be going.

I wish 课堂 - SpeakingMax英语口语达人

You start blaming yourself, thinking I must be doing something wrong, there's something wrong with my child.

BBC: Surgeons warn many cleft palate cases missed at birth

She warned me that when taking a photograph I must be careful and include the men's whole bodies in the frame.

BBC: North Korea: Life in cultural isolation

Well, I must be a moron because I found it incredibly difficult.

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