英:/''kʊdnt/ 美:/''kudnt/
v. 不能（等于could not）
I couldn't find my keys this morning.
今天早上 我不能找到我的钥匙了
Thank you all for all of the wonderful support. I couldn't have done it without you!
感谢大家的大力支持。没有你们，我不可能做到！
We couldn't find enough interested students, so we had to cancel the art class.
我们找不到足够数量感兴趣的学生，所以只能取消美术课了。
The facilities at this gym are so complete, you couldn't ask for more!
这个健身房的设施很完备，你别无他求！
Our car couldn't get any traction on the sand and we had to call a tow truck.
车在沙滩上没什么摩擦力，我们需要叫一辆拖车。
As the only person who couldn't speak French at the party, I felt a bit alienated
作为聚会上唯一一个不说法语的人，我感觉有点不合群。
The bachelor loved dating various women, but would always break up with them when they couldn't fit his present needs.
这个单身汉喜欢和不同的女人约会，但是一旦她们不能满足他现有的需求就会和她们分手。
I couldn't get my homework done because it was really hard.
我作业做不完了，实在太难了。
I couldn't open the window last night, it was frozen closed!
昨晚我没法打开窗户。都冻住了！
After her fiancé cheated on her, she couldn't stick with him anymore.
她未婚夫出轨后，她就无法跟他继续下去了。
A: Starbucks is overrated. B: Couldn't have said it better myself.
A：星巴克也不怎么样啊。 B：你说的太对了。
Because I'm nearsighted, I couldn't see the door to the building and walked too far.
因为我近视，没看到大楼的门，结果走过了。
I couldn't trust him anymore.
我再不能相信他了。
Why couldn't he listen to her?
为什么他不能听她的话？
I couldn't stand that yowling.
我无法忍受那种哀嚎。
Sorry, I couldn't get any more.
对不起，我无法弄到更多了。
What a shame they couldn't come.
他们不能来了，真是遗憾。
couldn't help
禁不住；不得不
v.|be incapable of/can not;不能（等于could not）
"couldn't" 的详细解释如下：
| 区别点 | couldn't | can't |
|---|---|---|
| 时态 | 过去时（描述过去的能力或可能性） | 现在时（描述当前的能力或可能性） |
| 语气 | 更委婉、礼貌（用于请求或推测） | 直接、明确 |
| 例句对比 | I couldn't call you yesterday. | I can't call you right now. |
| 否定推断范围 | 过去或假设情境 | 现在或普遍情况 |
示例：
“couldn't” 作为“could not”的缩写，主要用于过去时态的否定表达，涵盖能力缺失、推测否定及礼貌请求等场景。需结合语境区分其与“can't”的差异，尤其在时态和语气上。
couldn't 是 could not 的缩写形式，表示“不能，不可能”等意思。它是情态动词 could 的否定形式。下面是这个单词的详细解释。
couldn't 通常用于以下情况：
couldn't 是情态动词 could 的否定形式。情态动词用于表示说话者的意愿、建议、推测、能力、义务和允许等。它们通常不具有时态和人称的变化。在过去时态中，couldn't 表示过去无法做某事或不可能完成某事。在现在时态和未来时态中，couldn't 表示说话者缺乏能力或机会去做某事，或者表示某事情不可能或不可行。
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