-----for the free tickets, i would not have gone to the film

_____for the free tickets, i would not have gone to the films so often答案是 Had it not been 我想知道为什么要有一个been呢,虽然与过去事实相反,从句要用过去完成时,但也不能这样吧,没有被动意思,也没有"已经"的意思