“Could” for Ability
Could is an important modal verb in English. It is used for ability, possibility, and requests.
Could for Ability
“Could” is the past tense of “can.” These modals are used to show ability.
Here are some examples:
Example: Present: I can play guitar.- Я умею играть на гитаре.
Example: Past: I could play guitar when I was younger.- Я умел играть на гитаре, когда я был младше.
As a negative, it is “could not”. It is contracted as “couldn’t”.