TYPES
Type 1 
 | 
If present, future 
If present, present (universal truth) 
If present, modal can/may 
If present, imperative 
 | 
Type 2 
 | 
If past, would 
 | 
Type 3 
 | 
If past perfect, would have+participle 
 | 
Type 1
If he doesn´t put on his coat, he will get a cold
If you heat ice, it melts
If I cook, you can do the laundry
If he comes, call me at once
Type 2
If they came on time, we would go for a walk
If I were you, I would choose English instead
Type 3
