我不知道他什么时候走开的。

I don't know when he clear off.

youdao

神州吴昕背带裤什么时候走开始参加奥运会？

When did Chellona begin to take part in the Olympic Games?

youdao

她从头到脖子变得绯红。盖伯瑞尔同情地转身走开，不知道什么时候自己敢再看她。当他回身时，她已走了。

A deep blush spread from her head to her neck. Gabriel turned sympathetically away, wondering when he dared look at her again. When he turned back, she had gone.

youdao