I won't go unless
If we had known about Dan's allergy.
If I were you,
If he knew the results,
If you climb that tree,
If I hadn't eaten so much
Dad would be angry
He wouldn't have arrived late
he wouldn't hide them
if he saw you now
we would have helped him
I wouldn't have felt sick
I wouldn't tell Andy
you will feel dizzy
you come with me
if he had left on time