Lyrics of "End of the World"?

Question

In our English class we sing "The end of the world" of Davis Skeeter. The lyrics we use, that is printed in Japan, says "It ended when you say Goodbye". I think "said" is correct instead of "say" from English grammar. Please teach me.

Answer 1

The End of the World, Herman's Hermits version

Why does the sun go on shinning?
Why does the sea brush the shore?
Don't they know it's the end of the world?
When you don't love me any more.

Why does my heart go on beating?
Why do these eyes of mine cry?
Don't they know it's the end of the world?
It ended when you said goodbye.

I wake in the morning and I wonder,
why every things the same as it was
And I can't understand, no I can't understand,
why life goes on the way it does.

Why do the birds go on singing?
Why do the stars shine above?
Don't they know it's the end of the world?
It ended when I lost your love.

(instrumental)

Don't they know it's the end of the world?
It ended when you said goodbye.

Answer 2

Everyone came around here
Everyone else got sick
And watched the clock tickin' slowly
Everyone knew the ending
Opened a bag of tricks
And stumbled over their own
They blew minds away
Sort of the cripplin just like thunder
And it's gone today
I'm so happy that it's on

It's the end of the world

Well it's far away
In a hurricane, twisting slowly
Now it's gone today
I'm so happy that it's on

It's the end of the world

My world, my love, my gun

Now I'm all alone
Kept the pain inside
Wanna torch the world
Cause I'm breathin fire

My world, my love, my gun