All the documents have been sent by our lawyers.

All the documents are being checked by our lawyers.

All the documents will be checked by our lawyers.

All the documents have been checked by our lawyers.

When he drove passengers to the airport, the bus would often break down and many people would be late for their flights.

When he was driving passengers to the airport, the bus broke down and everybody arrived late for his flight.

When he was driving the passengers to the airport, the bus slid off the road and many people were late for their flights.

When he was driving passengers to the airport, the bus broke down and many people were late for their flights.