We use could to ask for permission. Could is more formal and polite than can: Could I ask you a personal question? We use could to show that something is possible, but not certain: They could come by car.

Understanding the Context

(= Maybe they will come by car.) They could be at home. (= Maybe they are at home.) We use can to make general statements about what is possible: It can be very cold here in winter. (= It is sometimes very cold here in winter.) Learn 8 expert ways to use could in English—past abilities, polite requests, regrets, and more—with real examples and clear practice tips. Key rule: “Could”, “would”, and “should” are modal verbs used to talk about ability, possibility, requests, advice, or expectations.

Key Insights

Each has a specific usage and meaning that changes depending on the context. Common exceptions occur in conditional sentences or indirect speech. How to Use Could, Would and Should in English (2025 Guide) - Vedantu The meaning of COULD is —used in auxiliary function in the past, in the past conditional, and as an alternative to can suggesting less force or certainty or as a polite form in the present. How to use could in a sentence. Master all 9 modal verbs (can, could, may, might, must, shall, should, will, would) with clear explanations, examples & quizzes.

Final Thoughts

Learn the rules, differences, sentence formations AND... MODAL VERBS: All you need to know about CAN, COULD, MAY ... - YouTube “Would” is used for hypotheticals and future possibilities that may not occur. “Should” implies advice, expectation, or probability. “Could” expresses past ability or present possibility. First of all, ‘would’ is a modal auxiliary verb and is the past tense form of ‘will.’.