Question

I_____ late until yesterday since I became a teacher

这里填 had never been 还是have never been
再说明一下理由 谢谢啦

Answer 1

had never been
因为从后面的时间状语是一个过去式来看，前面的时态就应该是过去完成时。
翻译：自从我当上老师以来，我到昨天为止从来没迟到过。

Answer 2

had

Answer 3

I (have never been) late until yesterday since I became a teacher

Answer 4

had never been
过去完成时，昨天迟到了。