北师大高中英语Unit13 Lesson4:"The day that I met my best friend for the first time, I was full of anxiety."中the day作什么成分？

解答：名词 the day, the year, the hour, the minute, the second 等也可用作连词，引导时间状语从句。例：

The day he returned home, his father was already dead. 他到家的那一天，他的父亲已去世。

He left Europe the year World War Ⅱ broke out. 第二次世界大战爆发那一年他离开了欧洲。

I went to college the year I met her. 我上大学的那年遇到了她。

I want to see her the minute that she arrives. 她一到，我就要见她。

另：有人认为上述句子the day前省略了介词on, the day后that引导的是定语从句，修饰the day。因为当定语从句先行词为时间名词，引导词可用that代替when,也可省略。