Each verse looks something like this except for the last verse:
|--0-7-7---------------------------7-7------------------------7-5---------5-3-------|
|--------7-5-5-0-5-5-7-5---------5-----7-5-5-0-5-5-7-5------5-----5-7-3-3-----1-----|
|-----------------------------------------------------------------------------------|
|-----------------------------------------------------------------------------------|
|-----------------------------------------------------------------------------------|
|-----------------------------------------------------------------------------------|
[ Tab from: http://www.guitaretab.com/s/sound-of-music/333182.html ]
|------------3-5-7-5---------|
|--0-1-3-5-7---------4-------|
|----------------------------|
|----------------------------|
|----------------------------|
The last verse goes...
|--7-7-7--------5-5-5--------3-3-3----------------------3-5-3-5-7----7-7-8-7-8---7-3-|
|--------5-----------3------------1-5------5-5-7-5-7-7-----------------------------3-|
|------------------------------------------------------------------------------------|
|------------------------------------------------------------------------------------|
|------------------------------------------------------------------------------------|
|------------------------------------------------------------------------------------|