But there are no clear rules about who gets what service or for how long.

They said it was not clear who lived in the house and for how long.

It is not clear where she went or for how long.

But no one could tell him whether that would do any good, or for how long he should try to hold them off.

Of course, it is an open question whether the good times are here to stay and for how long.

She hadn't been home for long, and she'd head out on the road again soon.

He could not hold the vision before him for very long at a time.

I can't tell you where exactly, or for how long.

For how long would he continue to be so patient?

Do not stay in one position for too long, though.