Prepositions and suffix

[Neytiria]

Someone explain prepositions for me
The PDF only confuses me.

[omumyu]

Prepositions explain the context of the action.  I went to the store.  He stands on the box.

[Plumps]

And as the term already implies in most languages these little neat words come before (pre- = in front) the word they explain. That's the reason why Frommer calls them adpositions in Na'vi, because they can stand before or after the word (at least, that's how I understood it).

[omängum fra'uti]

The farewall wish of "Eywa ngahu" is a good example of adpositions actually.

Eywa you-with is the literal translation.  But -hu is just an adposition.  It could equally be "Eywa hu nga" and still mean the same thing.

[Plumps]

Exactly my point