as if 虚拟的用法

问题描述:

as if 虚拟的用法
He treated me as though/as if _____ his own son.
A.I am B.I would be
C.I was D.I were
前后时态有什么关系

D
虚拟语气以过去时铺底
主句用一般过去时那么虚拟部分要过去 所以AB不选
接着 虚拟语气中 只能用were不能用was(就算是人称是He She)
所以是D