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: