"We love our teacher."
Translation:Мы любим своего учителя.
I think it is because singular animate masculine objects in the accusative case add an a/я at the end, as if it were genitive.
They do if they are animate (i.e., refer to a person or an animal).
- Я вижу фонарь. I see a lantern.
Я вижу стол. I see a chair.
Я вижу учителя. I see a teacher.
- Я вижу кота. I see a tomcat.
you also need to put the correct ending on наш/свой, which in this case is -его
I completely forgot that animate masculine nouns change in the accusative! But are they the same as genitive then?