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could

美 [kəd]
英 [kəd]
  • modalv.可以;用于 can 的过去式;(礼貌地请求别人做事)能
  • auxv.想;“can”的过去式;用于假设语气的条件句;用于虚拟语气的结论句
  • 网络能够;可能;会
could
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modalv.
1.
(用于 can 的过去式)used as the past tense of ‘can’
She said that she couldn't come.
她说她来不了。
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。
2.
(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?
3.
(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?
4.
(表示可能性)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。”
5.
(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。
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
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!
7.
(informal)
(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!

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