I see. When are they coming?

我明白了，他们什么时候来啊？

youdao

Phone them up and find out when they are coming.

给他们打个电话，问问他们什么时候来。

《牛津词典》

The speed and force of the huge waves there make it impossible to know in advance when they are coming.

在那里，巨浪的速度和力量使人们不可能预先知道它们什么时候会来。

youdao

They are coming in when they are symptomatic, which is usually after a decade of infection.

VOA: standard.2009.11.15

These are highly competitive athletes, at the top of their sport, coming here to Princeton when they were recruited.

这都是竞争力很强的运动员，属于单项之最，被普林斯顿招来时都是顶尖的。

普林斯顿公开课 - 人性课程节选

That also encouraged me to really write more and to really think about what is the story, how are people coming to this and like when I show my friends this, how are they going to react.

这也鼓励我编写更多东西,并且真正思考这个故事是什么，思考人们怎么想它,比如我向我的朋友展示的时候，他们会怎么反应。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

When are they coming to my town?

FORBES: SeatGeek Embraces iPhone Mobile

Yes, some football teams give tickets to their local battalions and regiments, but how many councils have written to their local battalions to ask when they are coming back from Iraq and whether they can give them a homecoming parade?

BBC: NEWS | UK | Gen Sir Richard Dannatt's speech

"I think what we want to achieve is to try to make the visitors into pilgrims, so that when they come here they are coming for a purpose, " he said.

BBC: Pilgrims' progress for St David shrine