Type One
If I win a million, I will buy a big house.
Type One
I am taking part in a quiz show, I've reached the final stage, I can make it!
If I win a million, I will buy a big house.
Type Two
I have never been fond of gambling. No way. But ...
If I won a million, I would buy a big house.
Type Three
It was last week, and I totally messed up. The million remains a nice dream.
If I had won a million, I would have bought a big house.