By the time / As soon as our parents arrived, my brother had cleaned the house.
By the time our parents arrived, my brother had cleaned the house.
As soon as / Until Lisa got pregnant with her first child, she had been working full-time as a nurse.
Until Lisa got pregnant with her first child, she had been working full-time as a nurse.
By / By the time the concert ended, everyone had left the venue.
By the time the concert ended, everyone had left the venue.