When he was 2, he --------- swim.
When he was 8, he could swim.
When she was 8, she --------- ride a bike.
When she was 8, she could ride a bike.
When he was 6, he ....... draw beautifully.
When he was 6, he could draw beautifully.
When the frog was 1, it....... jump very high.
When the frog was 4, it could jump very high.
When she was seven, she ..... bake a cake.
When she was seven, she couldn't bake a cake.
When he was 11 years old, he ....... swim.
When he was 11 years old, he couldn't swim.