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.
