Verbs in English

What's the position of the preposition after a verb? I mean we place the preposition directly after the verb? I'm talking about phrasal verbs.

I obviously do not need to correct this.

http://en.wikipedia.org/wiki/Phrasal_verb#Examples

It seems as if the preposition usually comes after the verb, but it depends.

If you think about it, the same thing happens in French. 

pronom personel et verbe, locution prépositive, nom/object à la fin de la locution.

Je suis au bout du rouleau.

I'm at the end of my rope.

Les deux expressions veulent dire le pareil.

Generally, the preposition immediately follows the verb.  Sometimes, it follows the adjective or adverb which better describes the the meaning of the speaker. (Adjectif/Adverb)

" I am totally down with that. "

If there is a direct object/indirect object, that can also follow the verb immediately.

I am working it over.

I am working over it.

I hope this helps!