1. I'll go to the party if you go, too.
I won't go to the party unless you go too.
2. You won't have more friends unless you open up more.
You will have more friends if you open up more.
3. If you don't stop teasing her, she won't to be your friend.
She won't be your friend unless you stop teasing her.
4.She'll be angry unless we say sorry.
If we won't say sorry, she'll be angry.