WAS / WERE or sing - SANG - sung
I lived in Brazil in 1998
I saw the Eiffel tower in 2010.
SERIES OF FINISHED ACTIONS
He flew to Spain and then drove to Portugal.
He went to the gym every week last year
have/has + past participle (SUNG)
I have lived in Brazil (since 1998)
I have seen the Eiffel tower.
He has travelled to the south of Europe by plane and car.
He is not home, he has gone to the gym .