By last year, twenty schools in this province (be) built. When i got to the party, they (go) home

1. By last year, twenty schools in this province (be) built.
2. When i got to the party, they (go) home.
3. She went to the department after her (clean) the floor .
4. Before he died , he (be) ill for several days .
5. Many people (move) to the new place before the storm occurred .