当我妈妈回来时，我正在做作业。

I was doing my homework when my mother came back.

youdao

我正在做作业。

I am doing my homework.

youdao

昨天的这个时候我正在做作业。

I was doing my homework at this time yesterday.

youdao

我正在做作业的时候他就来了。

I was doing my home work when he arrived at.

youdao

当他来的时候，我正在做作业。

I was doing my homework, when he came in.

youdao

当母亲做午饭时，我正在做作业。

While mother was cooking lunch, I was doing my homework.

youdao

我正在做作业时，她进来了。

When I was doing my homework, she came in.

youdao

昨晚大约九点的时候，我正在做作业。

I was doing my homework at about nine o 'clock last night.

youdao

我正在做作业，突然所有的灯都熄灭了。

I was doing my homework, suddenly all the lights went off.

youdao

我正在做作业的时候他给我打来了电话。

I was doing my homework when he called me.

youdao

对不起，我正在做作业。

Sorry. I'm doing my homework.

youdao

今天早上琼打电话来的时候，我正在做作业。

I was doing my homework when Joan called this morning.

youdao

你想和我在一起吗？对不起，我正在做作业。

Do you want to join me? Sorry, I'm doing my homework.

youdao

不是，我正在做作业。

No, I'm doing my homework.

youdao

我正在做什么？我正在做作业。不，我没有。

What I am doing? You're writing. No, I'm not.

youdao

因为我正在做作业。

Because I 'm doing my homework.

youdao

但是我正在做作业。

But I my homework.

youdao

我正在做作业呢，忽然听到“咚咚咚”的声音。

I was doing my homework suddenly I heard some sound of "Dong!"

youdao

经过教室的时候，我看到他正在做作业。

When passing by the classroom, I saw_him_doing his homework.

youdao

我现在正在做作业。

Im doing my homework now.

youdao

我在晚上做作业。我现在正在做作业。

I do my homework in the evening.

youdao

我现在正在做作业。

I'm doing my homework now.

youdao

我现在正在做作业。

I'm doing my homework now.

youdao