could
音标发音
- 英式音标 [kəd; kʊd]
- 美式音标 [kʊd]
- 国际音标 [强 kud, 弱 kəd]
- 英式发音
- 美式发音
基本解释
- aux. 能够， 可以；可能；差点就，本来有可能；很想
- v. 能（can 的过去式）
词源解说
- 直接源自中古英语的coud，意为能，知能。
用法辨析
- could为助动词can的过去式,其后可接不带to的动词不定式。
- could有两种否定形式,即couldnot和could not,其缩写形式为couldn't。这两种否定形式英美均通用,当使用could not时,特别强调not。
- could用于疑问句中并不表示过去时,而是表示现在时,此时语气比较委婉,有时表示把握不大或犹豫; could用于特殊疑问句常含有惊讶、迷惑等感情色彩。
- could表示“允许”,可用于人,也可表示环境、条件、法律的“允许”。could在表示“允许”时,只能指过去泛指的一般许可,而不能表示过去具体的许可。表示过去的具体许可时,可用实义动词allow, permit等。
- could也可用于表示“可能性”,即环境或其他因素产生的“可能性”。这种可能性可以是将来存在的(但把握不大),也可以是现在存在的实际可能,还可用来对过去的可能性进行推测。“could+动词不定式的完成式”可表示对过去发生情况的推测,也可表示过去没有实现的可能。前者只能用于否定句和疑问句中,肯定的回答只能用could; 后者则有时带有责备意味。“could+动词不定式的完成式”可用于虚拟语气,即能做却未做的事。用于否定式则意为“虽尽力而为,但仍达不到目的”; 用于if引导的非真实条件句中,可表示与事实相反或实现的可能性不大的情况。
- could还可表示过去的一般“能力”,即过去体力或智力上具有能够完成一件事情的能力或环境赋予的能力。在表示过去的一般能力时不可表示过去的“具体能力”,即过去某一特定场合进行某项具体活动的能力,并施展了这种能力。表示过去的“具体能力”时,通常用was/were able to, managed to等。但在否定句或含有否定意义的句子中,用could或was/were able to均可。
- could用于虚拟语气可表示can的各种意义,如可表示能力、可以、禁止、拒绝、可能、愿望等,但比can语气委婉。
- could也可用于建议做可能的事或值得做的事,还可用于表示一种结果或请求。
aux. (助动词)
词组短语
- Could break 早已破碎;再度;可以毁掉;我的心完全破碎
- Could there 莫不是
- Could be 可能是;可能的;可以是
- CUD Could 能;可以
- could likeorp 美国骆驼
短语
英英字典
- (CAN) past simple of "can", used to talk about what someone or something was able or allowed to do
- (PERMISSION) used as a more polite form of "can" when asking for permission
- (REQUEST) used as a more polite form of "can" when asking someone to provide something or do something
- (POSSIBILITY) used to express possibility, especially slight or uncertain possibility
- (SUGGESTION) used for making a suggestion
- (SHOULD) used for saying, especially angrily, what you think someone else should do
- You use could to indicate that someone had the ability to do something. You use could not or couldn't to say that someone was unable to do something.
- You use could to indicate that something sometimes happened.
- You use could have to indicate that something was a possibility in the past, although it did not actually happen.
- You use could to indicate that something is possibly true, or that it may possibly happen.
- You use could not or couldn't to indicate that it is not possible that something is true. (not)
- You use could to talk about a possibility, ability, or opportunity that depends on other conditions.
- You use could when you are saying that one thing or situation resembles another.
- You use could, or couldn't in questions, when you are making offers and suggestions.
- You use could in questions when you are making a polite request or asking for permission to do something. Speakers sometimes use couldn't instead of "could" to show that they realize that their request may be refused.
- You use could to say emphatically that someone ought to do the thing mentioned, especially when you are annoyed because they have not done it. You use why couldn't in questions to express your surprise or annoyance that someone has not done something.
- 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.
- You use could after "if" when talking about something that you do not have the ability or opportunity to do, but which you are imagining in order to consider what the likely consequences might be. (if)
- You use could not or couldn't with comparatives to emphasize that someone or something has as much as is possible of a particular quality. For example, if you say "I couldn't be happier," you mean that you are extremely happy.
- In speech, you use how could in questions to emphasize that you feel strongly about something bad that has happened.
- could do with&rarrsee do
剑桥英英字典
柯林斯英英字典
专业释义
- 金属壳封装
- 洞穴
- 使球入洞
- 罐头
- 片盒
- 删除字元
- 取消字元