Dear friends, I am still not entirely clear on the difference between them. Could you explain their usages backed up by some example sentences? I am embarrassed to ask this rudimentary question but I have been absorbing a lot of information lately and things just get mixed up in my head. Please do not refrain from mentioning any similarities you might find between Urdu grammar and Modern or Classical Persian grammar because that helps a lot. And this applies to any thread I open, not only this one.