I'm just doing my homework.

我只是在做我的家庭作业。

youdao

I was bawled out at school for not doing my homework.

我因为没做家庭作业在学校被训了一顿。

《柯林斯英汉双解大词典》

I was doing my homework when my mother came back.

当我妈妈回来时，我正在做作业。

youdao

Sometimes when I'm doing my homework, I just get carried away with talking to my friends online but my mum comes and tells me when it's time to stop.

BBC: Teenagers and their sleepless lives

This was brought out in recent research by economists at the Resolution Foundation (you see I have been doing my homework....) It found that higher unemployment was now having a much greater "chilling effect" on wages than in the past.

BBC: Living wage: Is there such a thing as a free pay rise?

Without doing my homework.

FORBES: Magazine Article