be on

to be on night duty

值夜班

By sunrise tomorrow we'll be on our way.

明天天亮前我们就将赶路。

The gaslights in the passage would be on, turned low.

走廊里的煤气灯应该是开着的，调得比较暗。

We were glad to be on dry land again.

再一次踏上陆地我们很高兴。

I'm meant to be on holiday.

我原本打算去度假的。

No one likes to be on the losing side.

没人喜欢输。

Environmentalists will be on the watch for damage to wildlife.

环境保护主义者将会密切关注对野生动物造成的伤害。

Don't worry, she'll be on time.

别急，她会准时到的。

to be on point duty

在指挥交通

Her parents are rumoured to be on the verge of splitting up.

据说她的父母快要离婚了。

Aren't you supposed to be on sentry duty?

你不是应该在站岗吗？

All eyes will be on tomorrow's vote.

所有目光都将聚集在明天的投票上。

His funeral will be on Thursday at Blackburn Cathedral.

他的葬礼将于星期四在布莱克本大教堂举行。

Camden Market is the place to be on a Saturday or Sunday.

卡姆登市场是周末的最佳去处。

I want to work, I don't want to be on welfare.

我想去工作，不想吃救济。