They may have to amputate.

他们可能不得不施行截肢手术。

《牛津词典》

We all have to stay alert.

我们都必须保持警觉。

《柯林斯英汉双解大词典》

I have to finish this essay today. We have to hand them in tomorrow.

我今天得完成这篇论文，因为我们明天必须交。

《牛津词典》

Friends and relatives do not even have to go to the store to choose a gift from the registry.

VOA: special.2010.08.09

OK, so I don't have to, it's a great question, I don't have to create a second one for cmp.

但是参数的顺序是相反的，好，那么我就不必，这是个很不错的问题,我就不必再创建。

麻省理工公开课 - 计算机科学及编程导论课程节选

That way you don't have to go to a gym afterwards , you don't have to go to Yoga,

这样你就不用下班以后再去健身房锻炼了，不用再去练瑜伽。

Have you 实战 - SpeakingMax英语口语达人

Photographers and travellers have to stumble upon each other in a bit of serendipity.

BBC: Expert portraits in touristy spots

When people are as contrite as the folks at JetBlue, you have to forgive them, right?

NEWSWEEK: U.S.

They'll have to stick to main routes, including the ones soldiers call IED magnets.

NPR: Sectarian Killings Divide Integrated Baghdad Suburb