could
音標(biāo)發(fā)音
- 英式音標(biāo) [k?d; k?d]
- 美式音標(biāo) [k?d]
- 國(guó)際音標(biāo) [強(qiáng) kud, 弱 k?d]
- 英式發(fā)音
- 美式發(fā)音
基本解釋
- aux. 能夠， 可以；可能；差點(diǎn)就，本來(lái)有可能；很想
- v. 能（can 的過(guò)去式）
詞源解說(shuō)
- 直接源自中古英語(yǔ)的coud，意為能，知能。
用法辨析
- could為助動(dòng)詞can的過(guò)去式,其后可接不帶to的動(dòng)詞不定式。
- could有兩種否定形式,即couldnot和could not,其縮寫(xiě)形式為couldn't。這兩種否定形式英美均通用,當(dāng)使用could not時(shí),特別強(qiáng)調(diào)not。
- could用于疑問(wèn)句中并不表示過(guò)去時(shí),而是表示現(xiàn)在時(shí),此時(shí)語(yǔ)氣比較委婉,有時(shí)表示把握不大或猶豫; could用于特殊疑問(wèn)句常含有驚訝、迷惑等感情色彩。
- could表示“允許”,可用于人,也可表示環(huán)境、條件、法律的“允許”。could在表示“允許”時(shí),只能指過(guò)去泛指的一般許可,而不能表示過(guò)去具體的許可。表示過(guò)去的具體許可時(shí),可用實(shí)義動(dòng)詞allow, permit等。
- could也可用于表示“可能性”,即環(huán)境或其他因素產(chǎn)生的“可能性”。這種可能性可以是將來(lái)存在的(但把握不大),也可以是現(xiàn)在存在的實(shí)際可能,還可用來(lái)對(duì)過(guò)去的可能性進(jìn)行推測(cè)?！?em>could+動(dòng)詞不定式的完成式”可表示對(duì)過(guò)去發(fā)生情況的推測(cè),也可表示過(guò)去沒(méi)有實(shí)現(xiàn)的可能。前者只能用于否定句和疑問(wèn)句中,肯定的回答只能用could; 后者則有時(shí)帶有責(zé)備意味?！?em>could+動(dòng)詞不定式的完成式”可用于虛擬語(yǔ)氣,即能做卻未做的事。用于否定式則意為“雖盡力而為,但仍達(dá)不到目的”; 用于if引導(dǎo)的非真實(shí)條件句中,可表示與事實(shí)相反或?qū)崿F(xiàn)的可能性不大的情況。
- could還可表示過(guò)去的一般“能力”,即過(guò)去體力或智力上具有能夠完成一件事情的能力或環(huán)境賦予的能力。在表示過(guò)去的一般能力時(shí)不可表示過(guò)去的“具體能力”,即過(guò)去某一特定場(chǎng)合進(jìn)行某項(xiàng)具體活動(dòng)的能力,并施展了這種能力。表示過(guò)去的“具體能力”時(shí),通常用was/were able to, managed to等。但在否定句或含有否定意義的句子中,用could或was/were able to均可。
- could用于虛擬語(yǔ)氣可表示can的各種意義,如可表示能力、可以、禁止、拒絕、可能、愿望等,但比can語(yǔ)氣委婉。
- could也可用于建議做可能的事或值得做的事,還可用于表示一種結(jié)果或請(qǐng)求。
aux. (助動(dòng)詞)
英漢例句
- I could run very fast when I was a schoolgirl.
我當(dāng)學(xué)生時(shí)能跑得很快。
用作助動(dòng)詞 (aux.)
詞組短語(yǔ)
- Could break 早已破碎;再度;可以毀掉;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 美國(guó)駱駝
短語(yǔ)
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
劍橋英英字典
柯林斯英英字典
專業(yè)釋義
- 金屬殼封裝
- 洞穴
- 使球入洞
- 罐頭
- 片盒
- 刪除字元
- 取消字元