could
/kʊd; kəd/
modal v.
一句话记住
能；可以；可能
释义与例句
modal v.
能；可以；可能
used as the past of can, to express possibility, or to make polite requests and suggestions
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She could read simple stories when she was five.
她五岁时就能读简单的故事了。
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Could you open the window, please?
请你打开窗户好吗？
展开其余 1 条例句
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The roads could be icy tomorrow morning.
明天早晨道路可能会结冰。
词源与构词
记忆钩子
could 后接动词原形；Could you...? 表示委婉请求，不一定是问过去能力。could have done 常表示“本来可以做而未做”。
词族与关联词
易混词（形近或义近，注意区别）
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can 能；会；可以could 可表示 can 的过去式，也可用于更委婉的请求或较不确定的推测；描述现在的一般能力通常用 can，而过去能力常用 could，但特定场合成功做到某事常用 was/were able to。Can you help me with this suitcase? 你能帮我搬这个手提箱吗？
常见搭配
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could you please 请你……好吗Could you please repeat the last sentence? 请你重复最后一句好吗？
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could have done 本来可以做；可能已经做了We could have taken the earlier train. 我们本来可以坐更早的那班火车。
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could not help 忍不住She could not help laughing at the joke. 她听到这个笑话忍不住笑了。