How come they have not returned yet?

他们怎么还不回来？

youdao

How unhappy he must be that I have not yet returned!

我还没有回去，他一定很不高兴！

youdao

When her courage returned she said, "You have not won me yet by that."

当她恢复勇气后，说道：“你猜中了，但我还不能嫁给你。”

youdao

Over a third of pre-Katrina residents have not returned yet.

BBC: RELATED BBC SITES

Mines belonging to AngloGold Ashanti have ceased production for almost a month, while workers at another Gold Fields mine - KDC East - have not yet returned to work but this relates to a local union dispute not wages.

BBC: South Africa Gold Fields workers 'end strike'

As many as 40 percent of the city's former residents have not yet returned because of the destruction.

NPR: Long-Awaited Fallujah Rebuilding Shows Promise