We need to develop a nice hearing sense! It comes to you when you spend more and more time with your Guitar and Mp3 player!!!! To find which Chord!! When you are trying a song.. Just humm the tune of it! Instead of humming the entire tune, just sustain with the starting note of the song part... Then run through your low E string and find out which note matches your humm!! Bingo! thats you chord!! (and obviously this not the case with all songs but generally this is what happens!) To find when the chord changes!! Not sure how to explain it! still! for ex: If you count 1 to 4 with the song, the counts comes exactly as shown below! You can FEEL if you LISTEN that the song have something like a bend or a hump by each count........... (Its tough to explain!! But that is the thing and there we change the chord. Listen listen and listen.. you will get the logic once.. once you get it its too easy to go on!!!) 1...........2.............3............4........... Na....hai.yeh....pa...na....................... 1...........2.............3............4........... Na....kho.na....he....hai..............Tera.. 1...........2.............3............4........... Na.....ho.na.....jaa...ne...................... 1...........2.............3............4........... Kuyn..ho.na.....he....hai..................... See that "Tere" part just before "Na Hona".. that 'tera' is invisibly present before first 'Na hei yeh' also.. and the note of 'te' of that 'tera' is our base note.. It is F#. And the first chord change is at 'yeh' and when we compare that with E string!! It is C#!! And the third chord is at 'na............' which is 'B'. This one is our 4th chord as well, Since na sustains till the end of 4th bit. So it becomes: F#.........C#...........B............B.......... Na....hai.yeh....pa...na..........*........... The third this is Strumming pattern: will be continued....