He said he would be on duty.

他说他会值班。

When do you be on duty?

你什么时候值班？

We need someone to be on duty.

我们需要一个人来值班。

Tonight, it's my turn to be on duty.

今天晚上轮到我值班。

These arrangements, extra ambulances will be on duty until midnight.

除了这些安排以外，另增援救护车值班至午夜。

In addition to these arrangements, extra ambulance will be on duty until midnight.

除了这些安排以外，另增救护车值班至午夜。

In addition to these arrangements, extra ambulances will be on duty until midnight.

除了这些安排以外， 另增救护车值班至午夜。

She has to be on duty on weekends too.

她周末也要上班。

Today it's my turn to be on duty.

今天轮到我值日。

I be on duty at eight every morning.

我每天早上八点上班。