You must do it for me in a hundred and one ways.

你必须千方百计地为我做这件事。

youdao

But you must do it.

但你必须那样做。

youdao

Don't worry about how many times you must do it.

不要担心你必须得做多少次。

youdao

But if you want to visit the newly opened Statue of Liberty, you must do it within the next two years.

VOA: special.2009.06.29

When you say "it must", this usually does not mean it needs to do something.

当你说“It must”的时候，通常并不表示它需要做某事。

Must 课堂 - SpeakingMax英语口语达人

That means if you go into the IRS OVDP to clean up your accounts, you must do it jointly, right?

FORBES: Must You Enter IRS Offshore Disclosure With Your Spouse?

Similarly, when you invest in your career and personal development, you must do it with the end game in mind.

FORBES: Five Most Effective Ways to Invest in Your Career

She said 'you must do this because it's what you want to do'.

BBC: NEWS | UK | Education | 'I gave up a City job to teach'