I´d ask you, that i have problem when is best to use should and when could or would.
Thank you very much
To answer you question specifically I need to know in what context you want to use these modal verbs. However for now here is a list of these three verbs and their usages (with example sentences)
- Ability (past tense of can): He could run fast when he was a boy.
- Polite request: Could I borrow your pen?
- Suggestion: Maybe you could get a tutor to help you
- Possibility/less than 50% certainty: Where's John? He could be home.
- Impossibility (with negative only) : That couldn't be true!
- Polite request: Would you please pass the salt?
- Preference: I would rather stay home tonight
- Repeated action in the past: As a child he would always obey his parents.
- Polite for "want": I would like you to send me a brochure.
- Unfulfilled wish: I would have liked a cookie, but there weren't any in the kitchen.
- Recommendation/advisability: People with high cholesterol should eat low fat foods
- Obligation: We should return the video before the video rental store closes.
- Assumption/expectation/probability: Susan should be in New York by now.
If you have any further questions please ask.