When I was 4 years old, ... (✘)
I couldn't ride a bike
Now ... (✘)
I can't drive (a car)
When I was a baby, (✘)
I couldn't eat sweets
When I was 3 years old... (✘)
I couldn't talk
Two years ago ... (✘)
I couldn't play football
When I was a baby, ... (✘)
I couldn't study
In the past, ... (✔)
I could run
When I was 5 years old... (✔)
I could sing
Today, ... (✔)
I can swim
Now, ... (✔)
I can cook