It’s a phrase because it doesn’t have a subject
Answer:
1. Its not very possible it might rain today. The sky is clear.
2. Don't break the speed limit. You may get a fine.
3. The doorbell rang. I think that's Mark. He said he might be here in 20 minutes.
4. The car is making a strange noise. It could be the battery.
5. Lars looks worried. He may be worried because he failed two exams.
Explanation: I hope I helped!
There'll be a wide variety of other vittles as well.
