F       :1-3-3-2-1-1
Fmaj7   :1-3-3-2-1-0
G9      :3-x-3-2-0-x  
G6      :3-x-2-4-3-x
D9      :x-5-4-5-5-0
C9      :x-3-2-3-3-0

This basically the strumming pattern for the verses but listen to the song for minor changes in strum.

   Fmaj7               G9  *         G6          F            
E|--0----------0--|-------(0)--|-------------|-----------1--|-----------1--|
B|--1-------1--1--|--------0---|------0--3---|--------1--1--|--------1--1--|
G|--2-------2--2--|------2-2---|------4--4---|---2----2--2--|---2----2--2--|
D|--3---3---3-----|------3-3---|------2--2---|---3----3-----|---3----3-----|
A|--3---3---------|------------|-------------|---3--3-------|---3--3-------|
E|----------------|--3-3-------|--3-3--------|---1--1-------|---1--1-------|
                                            
                                        *(0) Only really played the first time 

This is also the strumming pattern for the chorus. 
 
   D9                  G6         C9             F               
E|--0----------0--|------------|----------0--|-----------1--|-----------1--|
B|--5-------5--5--|-----| 0-3---|--3----3--3--|--------1--1--|--------1--1--|
G|--5-------5--5--|------4-4---|--3--3-3--3--|---2----2--2--|---2----2--2--|
D|--4---4---4-----|------2-2---|--2--2-2-----|---3----3-----|---3----3-----|
A|--5---5---------|--x-x-------|--3--3-------|---3--3-------|---3--3-------|
E|----------------|--3-3-------|-------------|---1--1-------|---1--1-------|
                                            


[Verse 1]

Fmaj7         G9        G6       F
Sometimes my love may be put on hold
Fmaj7         G9         G6         F
Sometimes my heart may se em awful cold
Fmaj7         G9        G6         F
These times come and these times go
Fmaj7         G9        G6          F
As long as I live, all you need to know is

[Chorus]

D9        G6        C9         F
This old dog ain't about to forget
D9        G6        C9         F
All we've had, and all that's next
D9        G6          C9         F
'Long as my heart's beating in my chest
D9        G6       C9         F
This old dog ain't about to forget

[Verse 2]

Fmaj7     G9            G6         F
Often a heart tends to change its mind
Fmaj7         G9        G6         F
A new day decides on a new design
Fmaj7         G9        G6         F
A new day gets set on another way
Fmaj7         G9        G6         F
As long as I live, all I've got to say is

[Chorus]

D9        G6        C9         F
This old dog ain't about to forget
D9        G6        C9         F
All we've had, and all that's next
D9        G6          C9         F
'Long as my heart's beating in my chest
D9        G6       C9         F
This old dog ain't about to forget