E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|----5--5-3--5--10-12-10-8-5-5-8-|
A|----5--5-3--5--10-12-10-8-5-5-8-|
E|----5--5-3--5--10-12-10-8-5-5-8-| x2

The part that usually comes before the chorus is...
E|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|
D|---8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-|
A|---8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-|
E|---8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-|

You could also do the beggining like this.
E|--------------------------------|
B|--------------------------------|
G|---------------5-7-5-3-----3----|
D|----5--5-3--5--5-7-5-3-5-5-3----|
A|----5--5-3--5--3-5-3-1-5-5-1----|
E|----5--5-3--5----------5-5------|

And the part before the chorus like this.
E|-------------------------------------------|
B|-------------------------------------------|
G|---3-3-3-3-3-3-3-3-5-5-5-5-5-5-5-5---------|
D|---3-3-3-3-3-3-3-3-5-5-5-5-5-5-5-5---------|
A|---1-1-1-1-1-1-1-1-3-3-3-3-3-3-3-3---------|
E|-------------------------------------------|