Modal Verbs CAN and COULD in English

Modal Verbs CAN and COULD in English, Difference between can and could in english

Modal Verbs CAN and COULD in English


Can Could
Offer Suggestion
Can I be of any help?  We could write a letter to the president.
Permission Permission
 You can put over there. Could I ask you a personal question?
Ability Ability
 I can drive a car. When I was a child, I could
spoke Germany.
Possibility Possibility
She can be really sad. He could be the one who stole
the money.
Request Request
Can you be quiet? Could I borrow your pencil,
please?