could you pass me a pen i'd like to write down the phone number.为什么选could?而不写should?

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could you pass me a pen i'd like to write down the phone number.为什么选could?而不写should?

could you pass me a pen i'd like to write down the phone number.为什么选could?而不写should?
could you pass me a pen i'd like to write down the phone number.为什么选could?而不写should?

could you pass me a pen i'd like to write down the phone number.为什么选could?而不写should?
因为could 用在表示委婉的请求的疑问句中,表示征求对方意见,或请求别人做某事,而should 是应该的意思
这句话的意思是:你能递给我一个钢笔吗?我想记下电话号码.
如果用should,那就是你应该借我一支钢笔吗?这样说不太合适.
有不明白的请继续追问,