verse 1 main riff         
G|2--22--2--0--00--0--------------------|
D|--------------------4--44--4--3--32-2-|
A|--------------------------------------|
E|--------------------------------------|

                           "leave you when the summer time  leave you when the summer.."
G|2--22--2--0--00--0-----------------------------------------------------------|
D|--------------------4--44--4--3--32-2-3--33--3--2--22--2--3--33--3--2--22--2-|
A|-----------------------------------------------------------------------------|
E|-----------------------------------------------------------------------------|

"leave you when
 the summer comes along"
                     G|2-2222-----------2-2222-----------2-2222-----------2-2222----------|
                     D|-------0-0000000--------0-0000000--------0-0000000--------0-0000000|
                     A|-------------------------------------------------------------------|
                     E|-------------------------------------------------------------------|

the second verse is the original riff played a bit faster.
 
  heavy part riff
G|22222-2-00000-0-----------------|
D|----------------44444-4-33332-2-|
A|--------------------------------|
E|--------------------------------|