What about playing basketball tomorrow? Good idea.But if it doesn't rain. 在这里怎么要用doesn't ?

问题描述:

What about playing basketball tomorrow? Good idea.But if it doesn't rain. 在这里怎么要用doesn't ?
What about playing basketball tomorrow? Good idea.But if it doesn't rain. 请问高手们在这里怎么要用doesn't 而不用won't呢? 谢谢了

这里是用了虚拟语气,本来应该是用未来时态,但是虚拟语气要求往前推一个时态,因此要用一般现在时.