Accent on "o" after "i" is replaced with "y", third person.

Question

Is there a rule about when the "o" at the end of the 3rd person has an accent or not? It seemed that when "y" replaces the "i", there's no accent on the "o", but that doesn't work for oyó

EDIT: maybe only after "j" replacement is the "o" without an accent?

Accepted Answer

Hola Janet
Traer is a verb that belongs to a specific group of irregular verbs in the Indefinido; these are called the "pretéritos graves" -this group of verbs share the same endings and they are not accentuated in the first and third person singular (accents that we find in the regular verbs).
Here is the link so you can have a bit more information and can see which verbs are involved. 
I hope it helps.
Saludos
Inma

Answer

Thanks for the explanation and link. What confused me (but no more!) was the accent remaining on caer, leer, oír in the 3rd person -- so I understand now, these verbs are not irregular, but just have spelling changes.

Answer

Inma, could you please make a link to https://spanish.kwiziq.com/revision/glossary/verb-conjugation-group/irregulares-en-indefinidomismas-terminaciones available for Notebook? I have been looking for this information for ages, and now I've found it I would prefer to hold on to it forever!