I don't mean to stickybeak, but when is he going to leave?

我不是要多管闲事，但是他什么时候要离开呢？

《牛津词典》

When is he going to play the piano?

他什么时候弹钢琴？

youdao

When is he going to be pensioned off?

他将在什么时候享受退休金而退休？

youdao

Sometimes when one person is speaking, he says the same thing that his friend was going to say.

VOA: special.2010.06.20

The Psalmist is going to use this motif when he denounces social injustice, exploitation of the poor and so on.

赞美诗的作者，也常常借用这种思想,谴责社会不公正，对穷人的剥削。

耶鲁公开课 - 旧约导论课程节选

But when he finally gets ill and comes up to the fact of his mortality, that his body is going to sicken and eventually die, the fact of his mortality seems to shock him, seems to surprise him.

但他最终病倒，和死亡面对面，身体每况愈下，最终死亡，这个事实让他震惊不已，他非常惊讶。

耶鲁公开课 - 死亡课程节选

Now Mort is struggling to remember where he is going when he steps outside and Veronica is afraid to leave him alone.

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House Minority Leader Dick Gephardt said when he goes door to door in his Missouri district, people ask him when he is going to stop wasting tax dollars on endless investigations.

CNN: Clinton Huddles With House Democrats

None of us are immortal and sooner or later Schumacher has to decide when he is going to hang up his boots for good.

BBC: Eddie Jordan Q&A