I do work hard.

我的确是有努力工作。

youdao

I do some voluntary work at the local hospital.

我在当地医院从事一些义务性工作。

《牛津词典》

I was trying to do some work.

我正试图做些工作。

《柯林斯英汉双解大词典》

And I remember when I was about twelve, her work and his work permitted us all to do that.

VOA: special.2009.11.23

I have made a conscious choice that I can't drive to work, I do have a spot in the parking garage.

我都会故意,不开车上班，我的车,停在车库里。

普林斯顿公开课 - 人性课程节选

A lot of cool stuff to do, I mean, I got opportunity to work in the city. It's a great city.

有很多很棒的事情可做，我的意思是，我能够有机会
在这里工作。这是个非常棒的城市。

旧金山最棒 - SpeakingMax英语口语达人

My marriage is more successful because I do work.

FORBES: Readers Say

Based on what I know of this company and of CEO Tim Sullivan and his management team thus far (as I do work with him directly) my personal optimism is high.

FORBES: Ancestry.com Acquired by Permira for $1.6B -- Eyes Further Expansion Into Western Europe

What if I could do work that I love, make enough money to be financially secure and afford a comfortable lifestyle, and have time to spend with my family?

FORBES: Stop telling me to grow big and spend. I'm happy the way I am.