Are these sentences OK?
(in a theatre etc.)
She was sitting in the row behind us.
She was sitting in the row ahead us.
She was sitting in the row front of us.

Question

Answer

first is good.
second should be ...She was sitting in the row ahead of us.
last should be....She was sitting in the row in front of us.

Answer

The first is okay (I'm not very sure about the second one, but from my point of view, it's ok), but the third one should be "She was sitting in the row in front of us." not "She was sitting in the row front of us." Hope this helped.