This should cover vocals and/or notes that come before the song actually begins.
Verses are most often four lines, but can vary, depending on the type of song you are writing.
The chorus should be catchy and easy to sing. It will be used between each verse.
The second verse goes further into the song and pulls out some real feeling.
Go over the final bit of the story you want to tell in the song.
A bridge is a great place to resolve the problem in your song and to leave listeners feeling emotions.
The outro is a final, fading farewell to your song and may involve voices or just music notes, like the intro.