1 can 2 couldn't 3 can't 4 couldn't 5 could, can;t 6 Could 7 can can't 8 can't 9 couldn't 10 could
Mark could speak seven foreign languages perfectly well by the age of fifteen.
Could you use a mobile phone when you were four?
When my mum was a little girl, she could swim well.
Nobody could climb trees at the age of three