Eiendomspronomen

Dette er læreren min.
eller

Dette er min lærer.

Hun tenker på moren sin.
eller
Hun tenker på sin mor.

These statements are just the same.Confusing, right?

The only difference is that, when the "substantiv" comes first the "eiendomspronomen", it is required to use "bestemt" within the subtantiv. (e.g. læreren min).


The vise-versa is: min lærer.

And maybe, you are thinking, what are these sin and si?
English:
I can brush her teeth. But she can brush her teeth.

Norsk: 
Jeg kan pusse hennes tenner.
The first sentence is just fine but with the second sentence, it is totally WRONG: 
 Men hun kan pusse hennes tenner.


This should be the right way:Jeg kan pusse hennes tenner. Men hun kan pusse sine tenner.

Did you see the difference or maybe you are thinking what is this sine again?Well, look after sine, dine, mine, hennes/ her, she etc.