find sentences with the Passive Voise snd explain its use.

помоги пожалуйста)

1)is visited - present simple passive, показатель медли: every year
2)was built - past simple passive
was burned - past simple passive, показатель медли: in 1814
was painted - past simple passive
3)was sold - past simple passive, показатель медли: then ( в даном случае)