How might 'could' be used to describe a past general rule or possibility?

Mar 12, 2010 ... “Can you” is the most casual, “could you” is more polite and “would you” is the most formal and polite. Both can and could (and other modals, especially may and might) are used to express various kinds of possibility, ability, permission and potential. May 9, 2023 ... Do you use “can” and “could” correctly in English? Join me and learn how to use these two important modal verbs, in terms of grammar, ... Sep 3, 2021 ... “It can be hard to tell the difference between food poisoning and a stomach virus,” she admits. “If you've just been to an event where food ... Instead, it can be developed even in adulthood, and may depend on more general auditory and cognitive abilities. What is the difference between perfect pitch, ... Feb 1, 2013 ... Standard Medicare Appeals: Not Knowing the Difference Could Cost You Your Appeal Rights! ... distinction between expedited and standard appeals. Feb 13, 2013 ... "Can" is a rude way to ask, it's like giving a command. "Could" is a polite way to ask, it's like a requesting. Apr 21, 2023 ... The English language can be sometimes confusing. One specific topic that may be confusing is knowing the difference between "would" and ... Aug 20, 2022 ... There is no difference in meaning between “can you please” and “could you please”. Actually, sentences that begin with 'could', 'should', or ' ... May 26, 2020 ... Drinking and drug use can have a devastating impact on your health, especially when you have trouble controlling your consumption. Drug and ...