1,could和Can的用法区别

Could比can更加委婉。如在对长辈或者重要人士面前,用could比用can更尊重对方。在虚拟语气中一般都用could。比如If I could be a bird如何如何的。
could比can 在表达上要委婉些。could you help me do some shopping?希望别人帮自己东西,所以要用请求的语气。在意思上是没多大差别的。都是可以的意思。

could和Can的用法区别

2,can和could的区别

can与could1). can(1)表示体力或脑力方面的“能力”,也能表示根据客观条件能做某事的“能力”。He can drive.Can you jump as far as he did?I cant catch up with Jim.can与be able to二者都表示“能够”,区别是:can只有现在时和过去式,而beable to可用于各种时态。如:Ill be able to speak French in half ayear.He hasnt been able to finish it on time.(2)表示允许:You can go now.Can I use your bike?(3)表示推测:can表示猜测或怀疑只用于疑问句及否定句中。Who can it be?It cant be true.2). could(1)can的过去式,表示过去有能力及过去的可能性。He couldnt climb up the mountain.The news could be true.(2)表示客气地请求或委婉地陈述意见。Could you go skating with me tomorrow?Im afraid I couldnt give you an answertonight.(3)表示惊异、怀疑、不相信等态度How could he say that? He couldnt be in Beijing.

can和could的区别


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