could的英语

1. 表示能力,could 是 can 的过去.如：Can you speak English? 你会说英语吗?Could you speak English then? 那时候你会说英语吗? 2. 表示许可,注意以下用法：(1) 对于现在或将来的“许可”,要区分以下两种情况：a. 表示请求允许(即请求别人允许自己做某事),可用 can(=may)或 could(=might)(注意：这里的 could 并不表示过去,而是表示现在,只是语气较委婉).如：Can [May, Could, Might] I come in? 我可以进来吗?b. 表示给予允许(即自己允许别人做某事),一般只用 can(=may),而不能用 could 或 might.如：A: Could [Can] I use your pen? 我可以借用你的钢笔吗?B: Yes, of course you can.当然可以.(注意: 此处不用 Yes, you could)(2) 对于过去的“许可”,也要区分以下两种情况：a. 表示过去一般性允许(即表示某人随时都可以做某事),用 can的过去式(即 could).如：When I lived at home, I could watch TV whenever I wantedto. 我住在家里时,想什么时候看电影就可以什么时候看 (一般性允许).b. 表示过去特定的允许( 即表示在过去某一特定情况下允许进行某一活动),则不用 could, 而需换成其它表达(如：had permission或 was [were] allowed to).如：I was allowed to see the film yesterday evening. 昨天晚 上允许我去看了电影(特定的允许,所以不能用 could).3. 表示推测：(1) 对现在或将来的推测,can 通常只用于否定句或疑问句中,一般不用于肯定句：It can’t be true. 那不可能是真的.What can they be doing? 他们会在干什么呢?Can it be Jim? 那会是吉姆吗?但 could(可以表示现在)则可用于肯定句中：We could [may, might] go to Guilin this summer. 今年夏天我们可能要去桂林.(将来可能性)You could [may, might] be right, but I don’t think you are. 你可能是对的,但我并不认为你是对的.(现在可能性)注意：can 有时也用于肯定句中表示推测,这主要见于：a. 表示理论上的可能性(即从理论上或逻辑上分析是可能的,但实际未必会发生).如：Anybody who wants to can become a prison visitor. 只要愿意,任何人都可以到监狱去帮助解决犯人的困难.Mary is in poor health. She can be ill at any time. 玛丽的身体不好,她随时都可能会生病.Evem experienced teachers can make mistakes. 即使是有经验的教师也可能出错.b. 后接“be, get, seem, become＋形容词”,表示“有时会”、“时常会”等义.如：It can get very hot here. 这里有时会很热.She can be very unpleasant. 她有时很令人讨厌.My grandmother could be very unpleasant at times. 我祖 母有时候会让人非常不愉快.(2) 对过去的推测,必须在 can, could 之后接动词的完成式：a. can＋have＋过去分词(主要用于否定句或疑问句,一般不用于肯定句).如：I saw him just now;he can’t have gone to Japan.我刚刚见过他,他不可能到日本去了.Why does he know this? Can someone have told him about it? 他怎么知道? 会是哪个人告诉他了吗?b. could＋have＋过去分词(可用于肯定句、否定句或疑问句),主要用于：①表示对过去的推测,其意为“可能(已经)……”.如：He could have gone home. 他可能已回家了.Where could he have gone? 他会到哪里去了呢? He couldn’t have seen her there. 他不可能在那儿见到她.②表示过去没有实现的可能性(即某事本来可以发生,但却没有发生),意为“本来可以……”.如：He could have told her, but he didn’t choose to. 他本来可以告诉她的,但他没有这样做.③用来委婉地责备某人过去应该做某事而没有去做,意为“本来应该……”.如：You could have helped him. 你本来应该来帮助他的.④表示“差点儿就要”.如：I could have died laughing. 我差点儿笑死了.

could

发音：英 [kʊd , kəd]   美 [kʊd , kəd]

意思：

用于can的过去时；（询问是否可做某事）能，可以；（礼貌地请求别人做事）能

v.把（食品）装罐保存；让…卷铺盖走人；炒…的鱿鱼

can的过去分词和过去式

用法：

modal verb【不规则形式】 negative could not , short form couldn't

1、（用于can的过去时） used as the past tense of ‘can’

2、（询问是否可做某事）能，可以 used to ask if you can do sth

3、（礼貌地请求别人做事）能，可以 used to politely ask sb to do sth for you

4、（表示可能）可能 used to show that sth is or might be possible

5、（用于建议）可以 used to suggest sth

6、（对某人未做某事表示恼怒）本来可以 used to show that you are annoyed that sb did not do sth

7、（informal）（强调感觉）真想 used to emphasize how strongly you want to express your feelings

扩展资料：

语法：

1、Can is used to say that somebody knows how to do something. can表示懂得做：

It is also used with verbs of seeing, noticing, etc. 该词亦与see、notice等动词连用：

and with passive infinitives. 并与动词的被动不定式连用：

The DVD can be rented from your local store.

2、Can or be able to are used to say that something is possible or that somebody has the opportunity to do something. can或be able to表示某事情有可能或某人有机会做某事：

You use be able to to form the future and perfect tenses and the infinitive. 用be able to构成将来时、完成时和动词不定式：

3、Could is used to talk about what someone was generally able to do in the past. could表示过去通常能做：

something was possible on a particular occasion in the past. 关于在过去特定情况下可能的事用was/were able to或manage，但不用could：

In negative sentences, could not can also be used. 否定句也可用could not：

4、Could is also used with this meaning with verbs of seeing, noticing, understanding, etc. 亦可用could加see、notice、understand等动词表示此义：

5、Could have is used when you are saying that it was possible for somebody to do something in the past but they did not try. 表示过去有可能做某事但未做，用could have：

could

英式读音：[kəd; kʊd]

美式读音：[kəd; kʊd]

中文谐音：酷的

词义：

双语例句：

He could have made a fortune as a lawyer

他本可以当律师挣大钱的。