Can is used to show someone's ability.
For example, I can dance
(I have the ability to dance)
Could is the past tense of can.
For example, I could dance very well when I was a kid
Could is also used to show a possibility.
For example,
If I had studied well, I could have passed the exam.
(There is a possibility of me passing the exam)
Written on July 9, 2018, 12:26 p.m.