1. In back of means located behind.
Pattern 1: noun + in back of + noun
There is a beautiful tree in back of our house.
Pattern 2: verb + in back of + noun
Your sister sits in back of me in class.
Awesome Things You Should Know Before Visiting London
Awesome Things 8
The organizers of the 2012 London Olympics wanted Keith Moon to be one of the acts. They realized only later that he had already been dead for more than three decades