Question

Which of these sentences is correct?

As the boy was walking down the street, he sang a song about living happily ever after.
As the boy walked down the street, he sung a song about he lived happily ever after.
As the boy were walking down the street, he sang a song about living happily ever after.
As the boy was walking down the street, he sang a song about he lived happily ever after.

Answer 1

1 one is correct.....

Answer 2

2nd is the perfect sentence