Answer:
<u><em>Past Simple:</em></u>
Rockwell painted a picture.
<u><em>Past Continuous:</em></u>
Rockwell was painting a picture.
<u><em>Past Perfect:</em></u>
Rockwell had painted a picture.
<u><em>Past Perfect Continuous:</em></u>
Rockwell had been painting picture for 2 hours.
Since Liverpool, England, is the birthplace of the Beatles, the city offers a tour that includes a visit to the childhood home of Paul McCartney.
Unless I know Russian, I won't understand news on the Russian radio.