If you were nicer to me
I would...
If you don't put sunscreen on
You get burnt/ You will get burnt
I wouldn't have broken your computer
Unless/If you had ...
She will pass the test (don't use "if")
Provided that/ As long as/ Providing that/
Unless he's more organized
He won't ...
He will come to the concert
If...
If he falls asleep during my class again
I will...
As long as she continues like that
she will/won't
If he hadn't been so stubborn
I/She/He/We/You/They would have...