clean / two days ago
I could/n't clean the house two days ago.
age 1 / tie my shoes
I could/n't tie my shoes when Ie was 1 year old.
reach the top of a tree / age 8
I could/n't reach the top of a tree when I was 8 years old.
eat by myself / age 3 months
I could/n't eat by myself when I was 3 months old.
sleep / last night
I could/n't sleep last night.
walk / baby
I could/n't walk when I was a baby.
swim / age 6
I could/n't swim when I was 6 years old.
ride a bike / age 3
I could/n't ride a bike when I was 3 years old.