Question

what is the differents between would, should, and could and it's uses?

Answer 1

Would can be used sometimes for asking a question or even making a statement such as Would you like a cup of tea?/I would have done it for you it you had not teased me.
Could and should can also be used like would.Example:Could I borrow your pen?/I should buy that./Should i complete it for you? etc.Hope my answer is helpful.☺

Answer 2

All the three are in the past form of will, shall and can respectively.
And are generally use for statements.