every time,the first time,the moment,each time相当于什么词

英语教师回答：
every time 每次
Every time you go away,you take piece of me with you .
each time 每次
I had three tries and failed each time.
这两个相当于副词
the first time 第一次 是个名词词组 It is the first time that I see you.
若是加上for 组成 for the first time 就相当于副词了
On her boyfriend's birthday,she cooked for him for the first time.
the moment 名词
at the moment 也相当于副词
I am very busy at the moment.