I've waited for you here for two and a half hours - what do you mean you're not coming?
I've been waiting for you here for two and a half hours - what do you mean you're not coming?
By 2050 scientists will be finding a cure for cancer already.
By 2050 scientists will have found a cure for cancer already.
They won't definitely win this game, they aren't playing very well.
They definitely won't win this game, they aren't playing very well.