Present Simple:
He sings a song.
We go to the cinema.
The girl cry in the room.
Present Continues:
He is singing a song.
We are going to the cinema.
The girl is crying in the room.
Past Simple:
He sang a song.
We went to the cinema.
The girl cried in the room.
Past Continues:
He was singing a song.
We were going to the cinema.
The girl was crying in the room.