Did you know?How many time have you been late for school?(合并为一个宾语从句）怎么改

题目

Did you know?How many time have you been late for school?(合并为一个宾语从句）怎么改
有提示 Did you know how many times ____ ____ ____ late for school?

答案

you had been
从句要和主句时代一致.