Student or Learner
Which is the correct preposition after look back : at or to someone?
e.g. He was looking back at/to her.
My English teacher told me that to look back at someone - the person is the focus of the look and to look back to someone - the place where that person is, is the focus of the look.
Bhai is as usual sharp at his answers
The phrase "look back to" is used to mean "think about something in your past."
I look back to how I though in the 1990s, when things seemed so hopeless, and can hardly believe my good fortune now.
I look back to Martha Zippergeist, who I knew as a child and as an adult, and to how she was able to take her passion for saving old homes into a thriving restoration busiess, and I think that nothing is impossible if you have ambition and courage!
So it is POSSIBLE to "look back to" a person, but not to mean that you turn your head and look at them behind you.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.