what do you think of the film last night?it is the best film that i ____ever seen

题目

what do you think of the film last night?it is the best film that i ____ever seen
横线里为什么用have而不用had

答案

had been是过去完成时,指的是过去的过去.你看用的是is就可以知道,这里说的只是过去发生的事,不存在过去的过去,所以用have