The villageis a very different placefrom what it was when I was a boy.
主语系动词表语状语
from （what it was）when I was a boy.
宾从（作介词宾语）时间状语从句
different from的结构, “与.不同”
what it was这个宾语从句中缺少表语故用what, 不能用that(在宾语从句中不做成分)