Before I learned how to cook, I used to...
Once I started working, I realized...
Once I learned to ride a bike, I...
The moment I arrived at the airport, I realized I had ...
By the time I turned 18, I had already...
Before I had a smartphone, I used to...
The moment I heard the good news, I ...
Before I graduated from high school, I had already ...
By the time we got to the mall, the movie had already ...
After I moved to a new school, I started to...
Until I met my best friend, I had never...
As soon as I got my first job, I...