1) if + present simple / will + hele ww = het is mogelijk
If I win this race tonight, I will get a prize. OF I will get a prize, if I win this race.
VB toets: I ....... (to let) you go out, if you follow the rules.
2) if + past simple / would + hele ww = het is niet waarschijnlijk
If I won the lottery, I would buy a Ferrari. OF andersom
VB toets: If she ....... (to have) enough time, she would go to the gym.
3) if + past perfect / would have + vtdw = het is onmogelijk > praat achteraf
If I had won the race, I would have been happy. OF andersom
VB toets: If I ....... (to meet) her before, I wouldn't have introduced myself.