I was reading a book when the phone rang.

电话响的时候我正在看书。

同一单元的其他句子

• She has been studying English for five years.她已经学了五年英语了。
• They will have finished the project by next Monday.到下周一他们将已经完成这个项目。
• He had left before I arrived at the station.我到车站之前他已经离开了。
• We are going to visit the museum tomorrow.我们打算明天去参观博物馆。
• Do you usually take a walk after dinner?你通常晚饭后散步吗？