If I were you
If you didn't have an smartphone,
If you put ice into water,
If they don't come to class,
If you had told them before,
We would have finished one hour ago
She would be happier
Unless you do your homework,
If we pass the exams,
If your mother had been here
it melts
I would talk to her
if you had helped us
if she had a nice boss
you won't go out tonight
the students would have joined the activity
our parents will buy the concert tickets for us
they won't get the grant
she would have told you what to do
you wouldn't/couldn't communicate with your friends so frequently