what burke and snuffy said. (What I usually try to do Amergin is find someone who KNOWS how the lyrics fi)t - but if you are writing them and you can sing them to the tune - then you have to figure out what you are doing when you sing. Usually it's either splitting a note or slurring a number of notes. Sometimes it's dropping a note from the vocal line.

I went nuts trying to fit lyrics one time until I realized that when I SANG the thing there was a pair of notes at the end of one line I didn't sing anything to!