could
- modal可能会，有时会;（用于表示对某人的行为的厌恶）能，可以;(询问是否可做某事)能，可以;(礼貌地请求别人做事以及提供或建议某事物时)能，可以;能，会;（用于建议）可以;好像，仿佛;（强调感觉）真想
- can的过去分词和过去式
couldmodal verb
（用于can的过去时）
used as the past tense of ‘can’
She said that she couldn't come.
她说她来不了啦。
I couldn't hear what they were saying.
我听不见他们在说些什么。
Sorry, I couldn't get any more.
对不起，我无法弄到更多了。
（询问是否可做某事）能，可以
used to ask if you can do sth
Could I use your phone, please?
请让我用一下你的电话可以吗？
Could we stop by next week?
我们下周能过来一下吗？
（礼貌地请求别人做事）能，可以
used to politely ask sb to do sth for you
Could you babysit for us on Friday?
你星期五帮我们看一下孩子好吗？
（表示可能）可能
used to show that sth is or might be possible
I could do it now, if you like.
如果你愿意的话，我现在就可以做这事。
Don't worry─they could have just forgotten to call.
别担心，他们可能只是忘了打电话。
You couldn't have left it on the bus, could you?
你不可能把它落在公共汽车上了吧？
‘Have some more cake.’ ‘Oh, I couldn't, thank you (= I'm too full) .’
“再来点蛋糕吧。”“谢谢你，吃不下了。”
（用于建议）可以
used to suggest sth
We could write a letter to the director.
我们不妨给主管写封信。
You could always try his home number.
你总可以试着给他往家里打电话呀。
（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
They could have let me know they were going to be late!
他们要晚来，也该早告诉我一声呀！
（强调感觉）真想
used to emphasize how strongly you want to express your feelings
I'm so fed up I could scream!
我烦透了，非大喊大叫不可！
used to say that you need or would like to have sth
我真想喝一杯！
I could do with a drink!
Her hair could have done with a wash.
她的头发该洗一洗了。
could
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2
MODAL 能;会
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.For my return journey, I felt I could afford the extra and travel first class...
至于回程，我觉得我能多花点钱坐头等舱。
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3
MODAL 可能会;有时会
You use could to indicate that something sometimes happened.Though he had a temper and could be nasty, it never lasted...
虽然他爱发脾气，而且有时还很讨厌，但向来都只是一阵儿。
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4
MODAL 本能够，本可以(表示某事本有可能发生但却并未发生)
You use could have to indicate that something was a possibility in the past, although it did not actually happen.He could have made a fortune as a lawyer...
他本可以当律师挣大钱的。
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5
MODAL (表示某事可能属实或可能发生)可能
You use could to indicate that something is possibly true, or that it may possibly happen.Doctors told him the disease could have been caused by years of working in smokey clubs...
医生们告诉他这种疾病可能是由于多年在烟雾缭绕的俱乐部工作所致。
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6
MODAL (表示某事不属实)不可能
You use could not or couldn't to indicate that it is not possible that something is true.They argued all the time and thought it couldn't be good for the baby...
他们一直在争论，认为这对孩子肯定不好。
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7
MODAL (表示可能性、能力或机会)可能
You use could to talk about a possibility, ability, or opportunity that depends on other conditions.Their hope was that a new and better East Germany could be born...
他们希望能够诞生一个崭新的、更加美好的东德。
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8
MODAL 好像；仿佛
You use could when you are saying that one thing or situation resembles another.The charming characters she draws look like they could have walked out of the 1920s.
她画的那些优雅迷人的人物就好像是从20世纪30年代走出来的一样。
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9
MODAL (表示提议或建议)可以
You use could, or couldn't in questions, when you are making offers and suggestions.I could call the local doctor...
我可以给当地医生打电话。
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10
MODAL (用于礼貌地提出请求或征得许可。当说话者意识到可能被拒绝时，可以用 couldn't 代替 could)能，可以
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.Could I stay tonight?...
我今晚可以留下吗？
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11
MODAL (用以礼貌地打断某人或引出将要说的话)请允许我
People sometimes use structures with if I could or could I as polite ways of interrupting someone or of introducing what they are going to say next.Well, if I could just interject...
嗯，请允许我插一句。
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12
MODAL (用以强调某人应该做所提及的事情，尤用于当说话者因为其没做该事而生气时)
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.We've come to see you, so you could at least stand and greet us properly...
我们都来看你了，你至少应该起身得体地打个招呼。
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13
MODAL (表示想要做某事的强烈感情)
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.I could kill you! I swear I could!...
我想杀了你！我发誓我真想杀了你！
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14
MODAL (用在if后以谈论没有能力或机会做但为考虑可能的结果而设想去做的事)
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 I could afford it I'd have four television sets...
假如能买得起，我就会有4台电视机。
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15
MODAL (与比较级连用，强调某物或某人具备某种特征的程度)太…，再…不过
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.The rest of the players are a great bunch of lads and I couldn't be happier...
剩下的选手是一帮很棒的小伙子，我太高兴了。
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16
MODAL 怎么会(用在疑问句中强调对所发生的不愉快之事的感受)
In speech, you use how could in questions to emphasize that you feel strongly about something bad that has happened.How could you allow him to do something like that?...
你怎么会允许他做那样的事？
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17
CONVENTION 不用了(谢绝更多的食物或饮品)
You say 'I couldn't' to refuse an offer of more food or drink.'More cake?' — 'Oh no, I couldn't.'
“再来点蛋糕？”——“哦不，不用了。”
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18
could do with→ see:do
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We could hear sounds of revelry from next door .
我们能够听到隔壁纵饮狂欢的声音。
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She confounded her critics and proved she could do the job .
她驳倒了批评者的看法，证明自己能够胜任那项工作。
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Well , you can 't have it , so there !
好啦，不给你了，就是这样！
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Can she take the heat of this level of competition ?
她承受得了这种水平的比赛的压力吗？
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You can get me on 0181 530 3906 .
你找我可以拨打01815303906。
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I think we could all use a drink after that !
我想我们在事情办完之后都得痛快地喝一杯。
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What do you need your own computer for ? You can use ours .
你干吗还要自己买电脑？你可以用我们的。
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I don 't know how you can say things like that .
真想不到你怎么会说出这种话来。
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We 'll give you all the help we can .
我们将尽力帮助你。
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The money could be better spent on more urgent cases .
这笔钱用于较紧迫的事情也许会好些。
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Modern farming methods can have an adverse effect on the environment .
现代农业耕作方法可能对环境造成负面影响。
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He might get there in time , but I can 't be sure .
他有可能准时到达，但我不敢肯定。
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You can back up another two feet or so .
你可以再退两英尺左右。
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Can we take it as read that you want the job ?
我们能不能认为你想要这份工作？
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You can ask for a chemical analysis of your tap water .
你可以要求给你的自来水做化学分析。
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He isn 't here now ─ could you ring back later ?
他现在不在——你过会儿再打电话来好吗？
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Could we get back to the question of funding ?
我们回到资金问题上来好吗？
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If he can 't help , there 's always John .
如果他帮不上忙，总还有约翰呢。
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Smoking can increase the risk of developing heart disease .
吸烟会增加得心脏病的危险。
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Could you help me change the bed ?
你帮我换一下床单好吗？
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These policies could cause severe economic and social dislocation .
这些政策可能引起严重的经济和社会混乱。
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The injury could mean him missing next week 's game .
这次受伤可能使他无法参加下周的比赛。
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Modern plastics can stand very high and very low temperatures .
新型塑料能承受很高和很低的温度。
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The new economic policies could prove suicidal for the party .
新经济政策可能给该党带来灾难性的后果。
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I 'll give you a key so that you can let yourself in .
我把钥匙给你，你可以自己开门进去。
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This could set a new fashion .
这或许会开创一种新时尚呢。
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Using too much water could spread the stain .
用水太多可能使污迹扩散。
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I can 't work up any enthusiasm for his idea .
我对他的想法怎么也热心不起来。
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How can I transfer money from my bank account to his ?
怎么才能把我账户上的钱转到他的账户上呢？
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I can 't be doing with people who complain all the time .
我无法忍受那些整天发牢骚的人。
- 习语
同义词