could not

美 
英 
  • auxv.能;行;难道会;(可)能
  • modalv.会;得;难道会;(表示知道如何做)懂得
  • n.(盛食品或饮料的)金属罐;一罐(的量);塑料容器;喷雾罐
  • v.把(食品)装罐保存;解雇;让…卷铺盖走人;炒…的鱿鱼
  • 网络不能;不可能;无法
could not
modalv.
1.
(表示有能力做或能够发生)能,会used to say that it is possible for sb/sth to do sth, or for sth to happen
I can run fast.
我能跑得快。
Can you call back tomorrow?
明天你能回电话吗?
He couldn't answer the question.
他不能回答那个问题。
The stadium can be emptied in four minutes.
这个体育场能让观众四分钟全部散场。
I can't promise anything, but I'll do what I can.
我不能许诺什么,但会尽力而为。
Please let us know if you cannot attend the meeting.
你若不能参加会议,请通知我们。
2.
(表示知道如何做)懂得,会used to say that sb knows how to do sth
She can speak Spanish.
她会讲西班牙语。
Can he cook?
他会做饭吗?
I could drive a car before I left school.
我在中学毕业前就会开车了。
3.
(与动词 feel、hear、see、smell、taste 连用)used with the verbs ‘feel’, ‘hear’, ‘see’, ‘smell’, ‘taste’
She could feel a lump in her breast.
她摸到自己的乳房上有一个肿块。
I can hear music.
我听见有音乐声。
4.
(表示允许)可以used to show that sb is allowed to do sth
You can take the car, if you want.
如果想用那辆车,你就尽管用吧。
We can't wear jeans at work.
我们工作时不准穿牛仔裤。
5.
(informal)
(请求允许)可以used to ask permission to do sth
Can I read your newspaper?
我可以看一下你的报纸吗?
Can I take you home?
我送你回家好吗?
6.
(informal)
(请求帮助)能used to ask sb to help you
Can you help me with this box?
你能帮我搬这个箱子吗?
Can you feed the cat, please?
请你喂一下猫好吗?
7.
(用于否定句,表示某事肯定不真实)used in the negative for saying that you are sure sth is not true
That can't be Mary─she's in New York.
那不可能是玛丽 — 她在纽约呢。
He can't have slept through all that noise.
他不可能在那种闹哄哄的环境里睡好觉。
8.
(表示疑惑或惊讶)究竟能,难道会,到底是used to express doubt or surprise
What can they be doing?
他们究竟在干些什么呢?
Can he be serious?
他难道会当真吗?
Where can she have put it?
她到底把它放哪儿了呢?
9.
(表示常有的行为和情形)有时会,时而可能used to say what sb/sth is often like
He can be very tactless sometimes.
他有时太莽撞。
It can be quite cold here in winter.
这里的冬天有时还真够冷的。
10.
(提出建议)可以used to make suggestions
We can eat in a restaurant, if you like.
如果你愿意,我们可以去餐馆吃饭。
I can take the car if necessary.
如果必要的话,我可以乘汽车去。
11.
(informal)
(表示对方必须做,常指说话人在生气时)必须,得used to say that sb must do sth, usually when you are angry
You can shut up or get out!
你给我闭嘴,要不然就滚出去!

例句

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