1. A watched pot never boils.

2. Don't you know a watched pot never boils?

3. A watched pot never boils, you'd better relax.

4. A watched pot never boils. Can you quit being such a nervous wreck?

5. Don't you know a watched pot never boils? Whether they're late or early, looking out of the window won't bring them here any quicker.

6. I have been waiting for that paint to dry for two hours now. How it is that a watched pot never boils?