I'm currently sitting my ATPL exams...and i can tell you, there not easy
Luckily, correct use of English is not a requirement.
@peter... I have the best of both worlds, a carburetted engine whose carb is tucked up at the back of the engine where it never gets cold (and a carb temp gauge too just in case). I've flown injected aircraft and hot starts can be a nightmare. Never a problem with a carb.
I've flown with quite a few instructors (in the US and for that matter the UK too) and never come across this idea of turning off carb heat on short final. Sounds nuts to me, a distraction just when you don't need it (especially for low time pilots but also for everyone else too). On everything I've flown, carb heat can be reset in the same movement as applying throttle for a go-around, and indeed that's what I've always been taught to do.