But when the curtain goes up, they are all in place.

But when the curtain goes down tonight, he'll be busy.

The curtain went down before we had to take it any further.

"Had he returned when the curtain went up on the second act?"

They give them about an hour there before the curtain goes up.

He let the curtain go and stepped away from the window.

They didn't believe him and the bar sold out before the curtain went up.

They hit something three times before the curtain went up.

He was about to say more, but the curtain went up for the second act.

I was also moved to such tears when the curtain went down after the first act.