''what's happened to you?''the old man said to me为什么HAPPEN要加ED如果是过去式为什么要用IS，WAS是不可以缩写的吧

分类: 作业答案 • 2021-12-20 02:39:16

问题描述：

''what's happened to you?''the old man said to me
为什么HAPPEN要加ED
如果是过去式为什么要用IS，WAS是不可以缩写的吧

答

what has happened to you
完成时态,用has