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. When I was younger I could stay up all night and not get tired.

Understanding the Context

It was so noisy that we couldn't hear ourselves speak. You said we could watch TV when we finished our homework. We asked if the computer could access the internet. She walked off before I could say anything.

Key Insights

We use could to show that something is possible, but not certain: They could come by car. (= 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.) "Could" is a modal verb used to express possibility or past ability as well as to make suggestions and requests. "Could" is also commonly used in conditional sentences as the conditional form of "can." Definition of could modal verb in Oxford Advanced Learner's Dictionary.

Final Thoughts

Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Learn 8 expert ways to use could in English—past abilities, polite requests, regrets, and more—with real examples and clear practice tips. COULD definition: a simple past tense of can. See examples of could used in a sentence. You use could when you are expressing strong feelings about something by saying that you feel as if you want to do the thing mentioned, although you do not do it.