I have to work hard today.

今天我得努力工作。

《牛津词典》

I'd love to come, only I have to work.

我很想去，但是我要上班。

《牛津词典》

My daughter continued her "conversation" as I sat down on the floor. She said, "I'm all fed up. I just don't know what to do with her anymore. She cries whenever I have to work and wants to play games, too."

我坐在地板上，女儿继续她的“谈话”。她说：“我受够了。我只是不知道该拿她怎么办了。每当我要工作的时候，她就会哭，还想玩游戏。”

youdao

Madam C.J.Walker explained it this way: "If I have accomplished anything in life, it is because I have been willing to work hard."

VOA: special.2010.03.28

I have a lot of work to do and I have to work tomorrow.

我有一堆活要干，我明天也得工作。

I'd rather 实战 - SpeakingMax英语口语达人

I mean, they have no idea how hard we work, and look at this gigantic split infinitive, to dramatically help.

他们不知道我们有多么努力地工作，注意到这之间的巨大鸿沟，会有很大的帮助。

麻省理工公开课 - 固态化学导论课程节选

So, the fact that I have to work bodes unwell for me in the marrage department, huh?

FORBES: Magazine Article

It is something I would like a shot at again, but I have to work my way up.

BBC: Ashes: Ian Bell hopeful of England revival in Brisbane

GLORIA(ph) (Durham Resident): My name is Gloria, and even though I have to work on that day, it's still a family day.

NPR: Voice of the People: Memorial Day at Dillard's BBQ