Re: could / was able to
Yoong Liat wrote:That day I could / was able to swim across the river because I was in high spirits.
Should I use 'could' or 'was able to'?
Many thanks.
We don't normally use 'could' to describe a one time event. 'could' is used to describe a past general ability.
When he was a kid, he could climb trees like a monkey.
*Yesterday, I could swim a mile.*
I suggest that you use 'was able to'.