Not more than an hour can have gone by since we turned in.

But what next, with an hour and a half to go?

I get lost in the work, and hours go by.

But an hour went by and he did not come.

Four hours to go, five at the outside, before he had to leave again.

Only three more hours to go, and she would find out.

She had only two hours and a long way to go.

Still, the first two hours of play had gone well for him.

But all I could do was watch the hours go by.

Two hours had gone by at least, probably more like three.