My first tab post but most certainly not my first time figuring out a song by ear.  I 
this fun and relatively easy. I hope this works for you guys... it works for me.  The key 
may be wrong, though.  I tried to fit it as best as I could.

Cm          Fm      G
Once upon a time I thought
Cm          Fm          G
"What's the one thing I haven't got?"
Cm                                                  Fm
There's not a single thing in this world I couldn't buy
Fm                        G
That's when a gentleman caught my eye
Cm      Fm            G
Once or twice we went around
Cm           Fm           G
But now I'll tell you the thing I've found
Cm                                     Fm
You shouldn't make your move until you know the price
        Fm               Cm
Because gentlemen aren't nice

Cm                      D  Dm          C
Just because I won't agree to take his arm
Cm      B(flat)    b(flat)m   Cm
And I occasionally forget his name
Cm                 D             Dm       C
He likes to call inclemency what I call charm
Cm
But I know they're all the same
             Cm           Fm    G
I think I've realized my first mistake
Cm       Fm             G
When he cried that his heart would break
Cm                                           Fm
I would have thought that I was worth the sacrifice
                     Cm
But gentlemen aren't nice

instrumental thing.  Play whatever or find the real notes.  I don't have time, sorry.  I 
use the chords in the key of c minor here for the bass and play notes within the key.  
I think she shifts keys.

Cm                       D     Dm       C
Just because I leave him all alone for days
Cm        B(flat)        b(flat)m  Cm
And go about with others of his kind
Cm                D        Dm    C
He dares complain about my evil ways
Cm                        Fm
And drive me out of my -- out of my mind
   Cm             Fm
What I relate is hard to bear
Cm                       Fm       G
I only endure it so that I might spare you ladies
Cm                   Fm
I'm not known for my good advice
    Cm
But gentlemen aren't
G   Fm
So agreeable
Cm            G    Fm
Love ain't a paradise
Cm                         G              Fm