Раскройте скобки, употребляя глаголы в соответствующем времени групп simple, continuous и perfect страдательного залога. 3 by six o’clock yesterday the work (to finish). 4 he often (to invite) to our parties.

3 By six o’clock yesterday the work had been finished.-Past Perfect Passive
4 He is often invited to our parties-Present Simple Passive