Intro:
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------| x4
D|-4-4-4--0-0-0--7-7-7---2-2-2-2-2-2-2-3-------------------------|
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|-------------------------------7-------------------------------| x1
D|-0-0-0-0-0-0-0-0-0-0-0-0---4h7---------------------------------|
Verse: x2
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------7----------------------------7------|
D|-0--0-0-0--0-0--0-0-0--4h7----0--0-0-0--0-0--0-0-0--4h7--------|
[ Tab from: https://www.guitartabs.cc/tabs/a/a_day_to_remember/if_i_leave_btab.html ]
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------7----------------------------7------|
D|-4--4-4-4--4-4--4-4-4--4h7----2--2-2-2--2-2--2-2-2--4h7--------|
Pre-Chorus: x2
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|
D|-4-4-4-2-2-2-0-0-0-0-0-0-0-0-0-0-------------------------------|
Chorus
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|
D|-7777777777777777-2222222222222222-44444444-22222222-00000000--|
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|
D|-2222-0000-----------------------------------------------------|
Verse: x2
Pre-Chorus: x2
Chorus: until the song ends