Explanation:
Hablamos=nosotros/nosotras
Hablan=ellos/ellas/son
Hablo=yo
Hablais=vosotros/vosotras
Habla=el/ella/usted
Hablas=tu
(I'm assuming you're asking what pronoun it goes with)
You don’t give enough information, can u give me more info and I’ll help
The verb that is in the incorrect past tense form is decia because when it says it in the sentence, it would be mé dijo instead.
The answer is decía. Hope this helps! :)