WITHOUT WATER,WE CAN NOT LIVE不行吗?只能WE COULD NOT LIVE?

问题描述:

WITHOUT WATER,WE CAN NOT LIVE不行吗?只能WE COULD NOT LIVE?

用can也能说明问题
但是WE COULD NOT LIVE? 比用WITHOUT WATER,WE CAN NOT LIVE更委婉,婉转,客气
这是can 与could的区别所在

可以用can

只能COULD
因为是虚拟的,(也就是说没有水只是个假设)