The young guy pushed the car for the old guy. What was pushed? For whom did he push it? the car the old guy The car is the direct object because it directly received the action of the verb. The old guy is the indirect object because it indirectly received the action of the verb.
Object complements Indirect To what/for whom was the action done? Direct Who/what was done? I threw a pillow at my brother. My brother gave me back the remote. I threw a pillow at my brother. My brother gave me back the remote.
to me to you to him/her to us to you all to them me you him/her us you all them
ALWAYS put object pronouns in front of the verb: Mando la carta. Habla con mi novio. Golpeas la pelota a nosotros. Hiervo los huevos para ti. La mando. Le habla. Nos la golpeas Te los hiervo.
EXCEPT with… Infinitives Positive commands The progressive tenses
THEN, you attach the objects to the end. Infinitives Positive commands The progressive tenses Dime Debes comerlo Estamos comiéndolos