Mary, this is Mike. Listen, Jerry and I wanted to go bowling tomorrow night, but we don't have a way to get there. If you drive, we'll pick up the tab for the bowling. How about it?
Well, it sounds like fun. But actually I've really got a lot of homework to do just now.
Oh, come on, Mary. It'll be fun. Make you relax. You'll study better.
I really can't. I've got a chemistry exam on Monday. And a book report due on Tuesday which I'm really getting nervous about. I don't think I'd enjoy it much. But thanks a lot for thinking of me. Sorry, I can't help you out.