Here are the lyrics (sing along if you feel so compelled)...

Conjunction Junction, what's your function?   
Hookin' up words and phrases and clauses.
Conjunction Junction, how's that function?
I got three favorite cars that get most of my job done.
Conjunction Junction, what's their function?
I got And, But, and Or.
They'll get you pretty far.

And! That's an additive, like this and that
But! That's sort of the opposite, not this but that
And then there's Or, O-R,
When you have a choice like this or that.
And, But, and Or get you pretty far!

Conjunction Junction, what's your function?
Hookin' up two boxcars and makin' 'em run right.
Milk and honey, bread and butter, peas and rice,
(Hey, that's nice)
Dirty but happy, diggin' and scratchin',
Losing your shoe and a button on two,
He was poor but honest, sad but true,
Boo-hoo-hoo-hoo-hoo.

Conjunction Junction, what's your function?
Hookin' up phrases and clauses that balance like:
Out of the frying pan and into the fire.
He cut loose the sandbags, but the balloon wouldn't go
any higher.
Let's go up to the mountains or down to the seas.
You should always say thank you, or at least say please!

Conjunction Junction, what's your function?
Hookin' up two cars to one when you say
Somethin' like this choice"
Either now or later,
Or no choice:
Neither now nor ever.
(Hey, that's clever)
Eat this or that, grow thin or fat.
Never mind, I wouldn't do that, I'm fat enough now!

Conjunction Junction, what's your function?
Hookin' up words and phrases and clauses
In complex sentences like:
"In the mornings, when I'm usually wide awake,
I love to take a walk through the gardens and down by
the lake,
Where I often see a duck and a drake,
And I wonder as I walk by, just what they'd say
If they could speak
Although I know that's an absurd thought."

Conjunction Junction, what's your function?
Hookin'-up cars and makin' 'em function.
Conjunction Junction, how's that function?
I like tyin' up words and phrases and clauses.

Conjunction Junction, watch that function!
I'm gonna get you there, if you're very careful.
Conjunction Junction, what's your function?
I'm gonna get you there if you're very careful.