Question

what is the difference between could and should?​

Answer 1

Just remember that could is used to talk about something that can happen, would is used to talk about something that will happen in an imagined situation, and should is used to talk about something that ought to happen or must happen

Answer 2

Answer:

could:it is used for saying that somebody had the ability or was allowed to do something

example: I could run three kilometres without stopping when I was younger.

should: it is used for saying that it is right or appropriate for somebody to do something, or for something to happen) ought to

example: The police should do something about street crime in this area.