He would enjoy the concert if he ____ present.空格中填was 还是 were?为什么?

He would enjoy the concert if he ____ present.空格中填was 还是 were?为什么?
He would enjoy the concert if he ____ present.
空格中填was 还是 were?为什么?

He would enjoy the concert if he ____ present.空格中填was 还是 were?为什么?
were 该句是虚拟语气

都不是。
用had been
这是虚拟语气，时态倒退一个等级。
前面过去式，后面要用过去完成。

were，这是虚拟语态，主语单数用were。

虚拟语气的用法
用 were
语法查一下