何时

何时

"何时" means "when."

Here, '何时' is used to inquire about a specific point in time, demonstrating its role as a question word for 'when'.

你何时会到达北京？

When will you arrive in Beijing?

In this case, '何时' serves to ask about the timing of a past event, maintaining its function as an inquiry for 'when'.

老师问学生们何时完成了作业。

The teacher asked the students when they completed their homework.

Here, '何时' is used in reported speech or indirect question to reference an uncertain time, retaining its meaning of 'when'.

我不清楚他何时离开办公室。

I am not sure when he left the office.