AI加词

could

kʊd

核心义 AI

能，可以（can 的过去式，也用于委婉或假设）

释义 AI

aux.
  1. 1（can 的过去式）能，会
    used as the past form of 'can' to say that someone was able to do something
    She could swim when she was five.
    她五岁时就会游泳了。
  2. 2（用于礼貌地请求）能，可以
    used to ask politely if something is possible or allowed
    Could you help me with this box?
    你能帮我搬这个箱子吗？
  3. 3（表示可能性）可能，也许
    used to say that something is possible or might happen
    It could rain later, so take an umbrella.
    一会儿可能下雨，带把伞吧。
  4. 4（用于虚拟语气，表示与事实相反的假设）能，可以
    used in conditional sentences to talk about something that is not real or did not happen
    If I had more time, I could travel more.
    如果我有更多时间，我就能多旅行。

例句 AI

Could you open the window, please?
请你打开窗户好吗？基础
When I was young, I could run very fast.
我年轻时能跑得很快。基础
The weather could be better tomorrow.
明天天气可能会更好。自然
If we had left earlier, we could have caught the train.
如果我们早点出发，就能赶上火车了。场景

搭配 AI

could be / do可能是 / 能做
could have done本可以做（但没做）
could not (couldn't)不能，不可以
could you please请你……好吗

短语与习语 AI

could not help doing忍不住做某事
could do with需要，想要
could be worse不算太糟

句型 AI

could + 动词原形
表示过去的能力或可能性
He could speak three languages.
他会说三种语言。
could have + 过去分词
表示过去本可以做而未做
You could have told me earlier.
你本可以早点告诉我。

语域与场景 AI

情态动词，无词形变化。用于礼貌请求、过去能力、可能性、虚拟语气。口语和书面语都常用。英美用法无差别。

近义词辨析 AI

can现在时，直接表示能力或允许
might表示可能性，语气更不确定
would用于礼貌请求或虚拟，但侧重意愿

易混词 AI

should表示应该，而 could 表示能或可能
would表示意愿或习惯，而 could 表示能力或可能

常见错误 AI

✕ Could you to help me?
✓ Could you help me?
情态动词后接动词原形，不加 to

助记 AI

could 是 can 的过去式，发音类似“苦的”，想象过去“苦”于能力不足，但现在可以了。

词源与构词 AI

源自古英语 cūþe，是 cunnan（知道，会）的过去式，后演变为 can 的过去式。

词频与标签

当代语料词频第 71 位最常用
BNC 词频第 55 位最常用
柯林斯星级★★★★★
牛津 3000核心词
考试大纲中考

词频排名越小越常用；柯林斯 5 星最常用。数据来自 ECDICT 词典，短语没有词频排名。

词条资料由 DeepSeek 生成，词典数据来自 ECDICT，仅供参考。发现错误？登录后可以反馈。