I think the intro bassline goes something like this:
e|---------------------------------------------------------------------|
B|---------------------------------------------------------------------|
G|---------------------------------------------------------------------|
D|--------------------------------------------------0-------0------2---|
A|-0-2-4-2-0-----------0-2-4-2-0----------0-2-4-2-0---4-2-0---4-2-0----|
E|-----------2-0-2-0-2-----------2-0-2-0-2-----------------------------|
Intro:
D C# F#m
D C# F#m
A D E
D C# F#m
Sometimes it moves so fast,
D C# F#m
Sometimes it moves so fast,
A D
If you stop to ask,
E
It's already passed,
D C# F#m
So how can you move so slow?
D C# F#m
How can you move so slow?
A D
You miss it if you don't,
You miss it if you,
E F#
Don't already know,
D Bm
already know, already know,
E F#m
already know, already know,
D C# F#m
D C# F#m
When your love is right,
D C# F#m
When your love is right,
A D
You can't sleep at night,
E
You've been sleeping just fine,
D C# F#m
But when your love is bad,
D C# F#m
When your love is bad,
A D
I don't know why you're so sad,
But it's time to go,
E F# D
You already know, already know,
Bm E
Already know, already know,
D Bm
You already know, already know,
E F#m
Already know, already know,
D C# F#m
https://www.coveralia.com/acordes/you-already-know-arcade-fire.php
D C# F#m
Sometimes it moves so fast,
D C# F#m
Sometimes it moves so fast,
A D
If you stop to ask,
E
It's already passed,
D C# F#m
So how can you move so slow?
D C# F#m
How can you move it so slow?
A D
You miseds it, you know
You missed it,
E F# D
You already know, already know
Bm E
Already know, already know,
D Bm
You already know, already know,
E
Already know,
D Bm
Please stop wondering why you feel so bad,
E D
when you already know, already know,
Bm
Please stop wondering why you feel so sad,
E D
when you already know, already know,
Bm
Please stop wondering why you feel so bad,
E D
when you already know, already know,
Bm
Please stop wondering why you feel so sad,
E D
when you already know, already know,
Bm E D Bm E
(Oh, oh, you already know, oh, it's time to go)
D
She said, "Well, how do I know,
Bm
when I know, when I know?"
E
You already know,
D
Then he said "Well, how do I know,
Bm
when I know, when I really know?"
E
You already know,
D
Then she said "Well, how do I know,
Bm
when I know, when I know?"
E
You already know, you already know (fade out)