If there name is a common name like Juan they change it to John but if not there parents or they will pick another random name
Si Antonio estuviera en la fiesta, el hablaria con Juan.
This sentence means - If Antonio had gone to the party, he would have talked to Juan.
It is a hypothetical sentence, meaning that it didn't happen but states what could have happened had he decided to go to the party.
Answer:
Pondré
Explanation:
Yo pondré el libro en la mesa.
