Hello dear native English speakers.
1. I don't care if it doesn't rain.
2. I don't care whether it doesn't rain.
3. I don't care if it rains.
4. I don't care whether it rains
5. I don't care whether it rains or not.
6. I don't care if it rains or not.
7. I don't care whether or not it rains.
Question:
Which is grammatically correct?
Do they have the same meaning?
I guess if 1# is grammatically correct , the speaker doesn't care the weather but perhaps other thing except the weather.
2# is grammatically correct but logically not thus wrong sentence.