When I was young, I could couldn't( could, couldn't ) play the guitar: it was too difficult for me!

Her grandmother was bilingual: she could couldn't( could, couldn't ) speak both English and Spanish.

Yesterday, Peter could couldn't( could, couldn't ) do that exercise alone. So, he called me for help.

In 1950, people could couldn't( could, couldn't ) use mobile phones.

When his mother was young, she could couldn't( could, couldn't ) skate but she can't do it any longer.

In 1900, people could couldn't( could, couldn't ) watch TV.

Mary's grandfather could couldn't( could, couldn't ) play chess and he was the best!

In 1945, people could couldn't( could, couldn't ) play video games.

But they could couldn't( could, couldn't ) play chess!

Peter could couldn't( could, couldn't ) play tennis last Monday: he had broken his arm!

When Ann was a teenager, she could couldn't( could, couldn't ) watch a horror film: it was too frightening for her!

Mozart could couldn't( could, couldn't ) play the piano when he was 5.