our teacher said he____(be)a teacher for ten years

our teacher said he____(be)a teacher for ten years
our teacher said he____(be)a teacher for ten years

our teacher said he____(be)a teacher for ten years
had been

had been

应该是had been。
要填的是said的宾语从句。
谓语是said 过去式。
所以从句用过去的时态，从句中状语for ten years
因此用完成时。
加上过去。
所以用过去完成时。
做老师。
所以had been >
ALL.
学习进步。

had been