Greensleeves contains first and second endings. The first time you sing through the verse, sing the first ending (Z), then go back to the beginning. The second time you sing through the verse, sing the second ending (X) instead of the first.
This arrangement of the traditional English folk song is in the key of E minor, which is the relative minor of G major. It is in ^ time and begins with a lead-in note. Notice the F# in the key signature, which reminds you to treat all F notes as F#. Notice also the frequent use of extra accidental sharps in this song. Both our male singer and our female singer found E minor a comfortable key for singing this song. Once again, the difference is that they are singing the same notes in different octaves.
This Rock song contains three lead-in notes. The melody contains both ties and eighth rests. Listen to the recording while watching the music. This will help you get a feel for the rhythms and the pitches of the notes.