The Ergs - Pray For Rain tab

If you know the rhythem of the song you'll understand 
[ Tab from: http://www.guitaretab.com/t/the-ergs/181100.html ]
e|------------------------------------|
b|------------------------------------|
g|------------------------------------|
D|---------99999999-66666666-44444444-|
A|-9999999-77777777-44444444-22222222-|
E|-7777777----------------------------|