资产评估 分析:can't have done与could't have done的区别

来源：百度文库 编辑：杭州交通信息网 时间：2024/04/28 08:08:58
我知道这两个都表示
过去不可能做过某事，但有什么区别啊？
两个都出现选哪个啊

couldn't 较 can't 委婉, 表示多半是由客观原因造成的不能做,而can't 的主观色彩相对浓一些.

could'thave done觉宛转
can't have done 是有能力上的问题

can't have done指现在已经不能做，
could't have done指以前应经不能做了。^0^

第一个是现在时,第二个是过去时

can't have done与could't have done的区别 mustn't have done和can't have done 的区别? 请问shouldn't have done和might not have done 在此题中的区别？ had+done 与have+done有什么区别? What two things can't you have for breakfast? What two things can't you have for breakfast? If i can't have you的原唱 选择题(翻译) Don't ____ unit tomorrow what can be done today. will have done sth 与 would have done sth 有什么区别啊 can but与can't but的区别