我正在完成工作，这时我妈妈走过来拦住了我。

I was finishing the job when my mum walked up and stopped me.

youdao

这时，他正在用拳头顶着医生的脸威胁他。

He was threatening the doctor, with his fist in his face, by this time.

youdao

我正在看电视，这时门铃响了。

I was watching TV when the doorbell rang.

youdao

Milton, who is writing at the present moment of December of 1629, is claiming the capacity to arrive at a moment in history that he has already described as a long-completed one.

这首诗作于1629年12月，这时弥尔顿正在慢慢具备他达到历史性时刻的能力,而这时他也已经被这样称赞着。

耶鲁公开课 - 弥尔顿课程节选