你弟弟正在干什么？他正在做家庭作业。

What's your brother doing? He's doing his homework.

youdao

当我离开时，他正在做家庭作业。

He _was ___ _doing_ his homework when I left.

youdao

他正在做家庭作业。

He is writing his homework now.

youdao

他正在做他的家庭作业。

He is doing his homework.

youdao

他正在做他的家庭作业吗？

Is he doing his homework?

youdao

当彼得的妈妈回到家时，彼得正在做他的家庭作业吗？ ？

Wass Peter doing his homework when his mother arrived home?

youdao

当彼得的妈妈回到家时，彼得正在做他的家庭作业吗？

Was Peter doing his homework when his mother arrived home?

youdao

他妈妈进来时那个男孩假装正在做家庭作业。

The boy pretended to be doing his homework when his mother came in.

youdao

他妈妈进来时那个男孩假装正在做家庭作业。

The boy pretended to be doing his homework when his mother came in.

youdao