this was the first time that i had serious troble with my boss是 定语从句,从句却什么成分?

问题描述:

this was the first time that i had serious troble with my boss是 定语从句,从句却什么成分?

在the time,the moment,the day后,通常用that代替when.
time作先行词,前面如有last等序数词修饰,通常
用that或省略.
祝开心~!