grammar unit 4 (conditionals)

• Zero: If/When + present...present        If you heat water, it boils
• First: If/Unless + present...future         If I play good, I will play the match
• Second: If + would...past participle     If I were you,I wold buy the red one.     
• Third: If + past participle...would have + past participle     If I had won the loterry, I would have travelled around the world.7
• I wish/ If only: + past simple = desire
•                          + would = complain 
•                         + past perfect = regret