How to use FOR, SINCE, AGO in English

Should you say “I’ve been in Australia for 3 months”? or “since 3 months”? or “3 months ago”?! Confusing, right?! Watch this video to learn how to use these 3 words so the next time somebody asks you “How long have you been in Australia?” you know exactly what to say.
Learn English at the best school in Australia: eu.edu.au/