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could

could /ˈkʊd/ /kəd/ verb
could
/ˈkʊd/ /kəd/
verb
Britannica Dictionary definition of COULD
[modal verb]
used as the past tense of can
Usage see: [1]can
used to say that something is possible
used with have to say that something was possible but did not actually happen
used to talk about something that is not possible but that is hoped or wished for
used in speech to make a polite request or suggestion
used to say that you are annoyed by something that was or was not done
used in statements that express a strong emotional reaction
used in statements that describe something as very bad, good, etc.

could care less

see 2care

could do with

◊ If you could do with something, you need it or would be helped by getting or having it.