I can't find my purse. Have you seen it?
No, I haven't.
I'Ve looked everywhere for it. I must have left it somewhere. I hope I haven't lost it.
Perhaps you left that at school.
No, I had it when I left school this afternoon.
Well. Didn't you go around to the Smith after school? You might have left it there.
Yes, I'd better give her a call now.
But she can't be home now. She might have gone to the library.