Direct Object (DO), the person, animal, thing who recieve the action made for the noun:
I see a dogI play footballI eat pizzaI watch tvThe doctor gave me a pill.... (me = Indirect Object-IO)
Now ..... ALWAYS IN ESPERANTO THE DIRECT OBJECTO ENDS IN -N.....ALWAYS!!!!!!!!
Nominative (or normal) = cat (kato)Accusative (DO) = katon
That way esperanto is fllexible to ALL people.....some people talk: noun + verb + complementother: complement + verb + noun .............etc
In Esperanto that doesn't matter, say it HOWEVER YOU WANT! JUST REMEMBER THE DIRECT OBJECT (-N)
EX:I watch TV ---------------> Mi spektas(vidas) Televidon ... the question is ¿what is watched? and the answer would be: DIRECT OBJECT (DO): TV
TV watch me -----------> Televido spektas(vidas) min ... now the direct object is "I" what is watched? = me (I)
So a simple sentence:
I see the girl ....(DO)--> what is seen?=the girl= (DO)Mi vidas knabinonKnabinon vidas mi
See? No matter the word order.
IMPORTANT: Some verbs don't need accusative, as in all languages:
ex: sein- to be- ser/estar ............... verb to be DOESN'T NEED IT!Mi estas gojan...........
Another thing........Adjectives also need accusative.
EX: I see a big girl, a small men and an ugly dog ..... what is seen? = a big girl, a small men and an ugly dog = (DO)
Mi vidas grandan knabinon, malgrandan viron kaj malbelan hundon.
It doesn't matter the order, because when you see the -n, you'll know that the thing, person, animal who recieve the action made fo the noun.