Taylor Swift is one of the most popular singers in the
world.  She has won many awards for her songs.  
"Should've Said No" was one of her first hit songs.  

The song uses the 3rd conditional.  This is the past
conditional, and it is for talking about regrets in the past.
 In this song, Swift is talking about things that happened
in the past and how they could have been different.

Look at the lyrics and how they use the 3rd conditional:

Subject  +  Modal  +  Have  +  Past Participle
You should have said no.

When you listen to the song, focus on the past
conditional grammar structure.

Here is the music video with a listening exercise below.

Fill in the spaces with the correct words

It's strange to think the songs we used to
The smiles, the flowers, everything: is gone
Yesterday I found out about you
Even now just looking at you: feels
You say that you'd take it all back, given one chance
It was a moment of weakness and you said yes

You should've said no, you should've home
You should've thought twice before you let it all go
You should've known that word, about what you did with her
Would get back to me
And I should've there in the back of your mind
I shouldn't be asking myself why
You shouldn't be begging for forgiveness at my feet
You should've said no, baby and you might still have me

You can see that I've been crying
And baby you know all the right things to
But do you honestly expect me to believe
We could ever be the same
You say that the past is the past, you need one chance
It was a moment of weakness and you said yes

You should've said no, you should've gone home
You should've thought twice before you let it all go
You should've known that word, about what you did with her
Would get back to me
And I should've been there, in the back of your mind
I shouldn't be asking myself why
You shouldn't be begging for forgiveness at my feet
You should've said no, baby and you might still have me

I can't resist... before you go, tell me
Was it worth it...Was she worth this

You should've said no, you should've gone home
You should've thought twice before you let it all go
You should've known that word, about what you did with her
Would get back to me
And I should've been there, in the back of your mind
I shouldn't be asking myself why
You shouldn't be begging for forgiveness at my feet
You should've said no, baby and you might still have me

Should've Said no - Taylor Swift

Business English