Birds sing.
I can sing well.
She began to sing.
She heard him sing.
He doesn't sing well.
I want to sing a song.
Can you sing this song?
She can sing very well.
I like the way you sing.
I want you to sing a song.
Are you going to sing here?
We'd like you to sing a song.
She is able to sing very well.
Why can't I sing like they can?
I can't sing as well as Mary did.
We'd like you to sing some songs.
He can sing better than any of us.
She wanted him to sing her a song.
She heard him sing his favorite song.