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.
Until / After people take serious action, we won’t be able to prevent the worst effects of climate change.
Until people take serious action, we won’t be able to prevent the worst effects of climate change.
When / By the time I graduate from university, I will take a year off and travel around Europe.
When I graduate from university, I will take a year off and travel around Europe.
As soon as / Until they separated, they tried counseling to save their relationship.
Until they separated, they tried counseling to save their relationship.
As soon as / Before she retires next year, she wants to train a replacement for her position.
Before she retires next year, she wants to train a replacement for her position.
When / By the time we solve the housing issue, we can focus on improving public transport.
When we solve the housing issue, we can focus on improving public transport.
As soon as / Until we take global warming seriously, climate change will continue to worsen.
Until we take global warming seriously, climate change will continue to worsen.
When / Until my grandparents retired, they ran a small bookstore in town.
Until my grandparents retired, they ran a small bookstore in town.
Once / After their engagement ceremony, they started planning their wedding immediately.
After their engagement ceremony, they started planning their wedding immediately.
Until / As soon as she found out she was pregnant, she started eating more healthily.
As soon as she found out she was pregnant, she started eating more healthily.
I cannot go out with my friends by / until I finish writing this essay.
I cannot go out with my friends until I finish writing this essay.
Once / By the time I got used to the water, it didn’t feel so cold and I didn't go out for two hours.
Once I got used to the water, it didn’t feel so cold and I didn't go out for two hours.
Mark and Luke have been friends since / until they met in high school.
Mark and Luke have been friends since they met in high school.
