I'm seeing the professor tomorrow,---he will be back from New Yorkwhen who which in which and why thanks

I'm seeing the professor tomorrow,---he will be back from New Yorkwhen who which in which and why thanks
I'm seeing the professor tomorrow,---he will be back from New York
when
who
which
in which
and why thanks

I'm seeing the professor tomorrow,---he will be back from New Yorkwhen who which in which and why thanks
when,引导时间状语从句

when,定语从句中做时间状语

when
when 引导非限制性定语从句

when