Whenever I speak it gets confusing for me where to use "would" and "could". I want some easy tips on how to use it. I mean overall how to use this model verbs for the past sentences and for the future sentences. And is there any certain genres of books I can read to improve my English speaking vocabulary?
I could have and I would have, but I can't, so I won't.
I could have (based on my assumed ability in the past) and
I would have (based on my assumed willingness in the past), but
I can't (based on my lack of ability now), so
I won't (based on my lack of willingness now and for the foreseeable future).
Does this help?