were singing, sang
They were singing the national anthem.
Tom tocava piano e as crianças cantavam.
Tom played the piano and the children sang.
As pessoas cantavam o hino nacional, quando os militares começaram a atirar.
People were singing the national anthem when the military started shooting.
— O Motorista de Táxi (2017)
João tocava violão e seus amigos cantavam.
João played the guitar and his friends sang.