Comma Police

Comma police, arrest this man

He talks so fast

He introduces me

Without using punctuation

Comma police, arrest this girl

She doesn’t see

Her introductory phrase

Sets the stage

For the rest of the sentence

This is what you get

This is what you get

This is what you get

When you use less of us

Comma police, I’ve done it once or twice

I may have left one out

But commas are important

I see that now

This is what you get

This is what you get

This is what you get

When you use less of us

When introducing you, I use a comma

In an introductory phrase, I use a comma

And now for your listening pleasure:

http://www.youtube.com/watch?v=lZHoci2Wjs0

This is what The Purdue OWL says about introductory phrases:

• Introductory clauses are dependent clauses that provide background information or "set the stage" for the main part of the sentence, the independent clause. For example: 
• If they want to win, athletes must exercise every day. (introductory dependent clause, main clause) 
• Because he kept barking insistently, we threw the ball for Smokey. (introductory dependent clause, main clause)

NOTE: We see this type of sentence in the Radiohead song.

Also, if you are introducing a person, use a comma.

Example: My neighbor, Barack Obama, sings in the shower.

If he didn't sing off key, I wouldn't mind so much...