Grammar rules:
We use ''can'' to talk about things we are able to do now or things that are possible.
Example: I can swim.
Negative: I can’t speak Japanese.
We use ''could'' to talk about ability in the past or to make polite suggestions.
Past: When I was young, I could run fast.
Suggestion: We could go to the park.
We use ''be able to'' when ''can'' is not possible, especially with different tenses.
Example: I was able to finish my homework.
Future: I will be able to drive next year.
Vocabulary:
• ability (noun): the power or skill to do something
• permission (noun): when someone says it’s okay to do something
• possible (adjective): something that can happen
• past (noun/adjective): the time before now
• present (noun/adjective): the time now
• future (noun/adjective): the time after now
• manage (verb): to do something difficult
• swim (verb): to move through water
• understand (verb): to know what something means
• hear (verb): to use your ears to notice sounds