actually there is no need to learn it!! just watch listen and read the people , how they do, how the talk., and you will get that!! just copy it our parent never thoughts us native language's grammar, still we can speak very well., its just like that way!!

PATIENCE.

Oh a tough question, are you studying conversation or written English? If its just conversation then just listen to English speakers and you will soon pick it up without having to think too much about all the rules of grammar. If you are studying written English, then the only way is to get a grammar study book. Still if you can read a lot of English you will pick a lot of it up. Even native English speakers who have good grammar sometimes don't know the names of all of the rules, it is very confusing. This site is great for asking as many questions as you need to. Please don't let the rules put you off. Don't give up. :-)

actually, what do you need? in conversation grammar it isn't the first priority.... but, if you are a student and for your writing class you need it..... just try to learn the function not just the formula like "Subject + verb", etc.... keep learning and don't give up :D

if you want to learn it I will teach you from the basic level if you are interested message me