How might 'could' express a past understanding?

Oct 26, 2023 ... In some cases, 'could' functions as the past tense of 'can', but there are some important usage differences between the two. The modal verb 'can ... ... between different vertebrate species. Most animal models are utilized for the purpose of generating results that can be extrapolated to human diseases. For ... Difference between CAN and COULD ; 3. Can is used to refer to the present and the future. Could can be used in all the tenses: present, past, and future ; 4. CAN ... Apr 20, 2021 ... “Would you” is correct, because you are asking if someone will do something and not if they can do it. “Would you” also sounds more polite than ... Can, could, and be able to are all used to talk about a person's ability to do something. You use can or be able to to talk about ability in the present. Be ... Light bleeding could be a sign that you successfully conceived…or it might ... How Can I Tell the Difference between Implantation Bleeding and My Period? Apr 3, 2019 ... “Hi, could someone please tell me the difference between the free ... I understand with the latter that you go inside Bodleian Library but can't I ... May 6, 2024 ... Both are modal auxiliary verbs, indicating possibility, capability, permission, or ability, but they operate in different temporal contexts. Jan 22, 2025 ... We use both can and could to talk about abilities and possibilities. But here are the biggest differences between can and could. Mar 13, 2019 ... These folders show the green tick icon. Online Only: This means that the files are stored online, in the cloud, yet can be accessed at any point ...