Conditional sentences

1st -     IF + Present Simple, Future (WILL)
            Example: If I train a lot, I will have a good score

2nd -    IF + Past Simple, Conditional (WOULD)
            Example: If I watched these film, I would be so happy

3rd -    IF + Past Perfect, WOULD HAVE + verb (ed/3col)
                 (HAD verb (ed/3col)
            IF I had known the answer I would have passed the exam