If I had understood the lesson, I approvewill approvewould approvewould have approved
If I were you, I buywill buywould buymight have bought
If you drinkdrankhad drunk
too much, you will get drunk.
If I taketookhad taken
my cat to the contest, it would have won a ribbon.
If he wrote a novel, it iswill bewould becould have been
If he eats tomatoes, he getswill getcould getwould have gotten