我们正在读书的时候，老师走了进来。

While we were reading, the teacher came in.

youdao

老师进来时，我们正在读书。

When the teacher came in, we were reading.

youdao

我们正在读书，我们没在画画。

We're reading. We aren't drawing.

youdao

我们径直前往那个唯一还亮着灯的房间，果然有个老人正在读书。

We went to the only room that had any lights on and there was a man reading a book.

youdao

我们径直前往那个唯一还亮着灯的房间，果然有个老人正在读书。

We went to the only room that had any lights on and there was a man reading a book.

youdao