"František takes care of horses."
Translation:František se stará o koně.
I don't understand when we have to put "se" after the verb and when have to put it before... Could someone explain ?
Se goes into the second grammatical position. It should be in the Tips and notes (web only).
Right, I get it :) But I think it's not really clear in the Tips... At least to me. Thanks again !
See the Tips and notes and https://en.wikipedia.org/wiki/Czech_word_order#Clitics
It is the first unstressed position after the first stressed unit in the sentence. That unit may consist of several logically connected words.