We're fortunate that it didn't rain today.We wouldn't have been able to play golf!请问第二句是什么意思什么时态?

We're fortunate that it didn't rain today.We wouldn't have been able to play golf!请问第二句是什么意思什么时态?

We're fortunate that it didn't rain today.We wouldn't have been able to play golf!
解析; fortunately it didn't rain .没下雨这是事实
If it had rained,we wouldn't have been able to play golf.其实没有下雨,其实打了球,和过去事实相反,所以用了过去完成时,这是虚拟语气.
高考题 I was busy yesterday,or i would have come.昨天忙（事实）,否则就来了（其实没有来）
i would have come,but i was busy yesterday.对过去的虚拟用过去完成时

要不然我们就不能打高尔夫了！过去将来时