Which is correct? Tu me dijiste... o Tu me dijistes... ?
It is a self-explanatory question on grammar.
3 Answers
If there is a person, it's "Tú me dijiste", but more than one person, it's "Vosotros me dijisteis". Moreover, Tú and vosotros are usually absent.
Marianne's answer is correct, of course
Hi and welcome to the forum. The preterit is "dijiste" (you said).
If you click on the "More" button at the top of this page a menu will pop up -- there is a conjugation tool there.
The correct form is dijiste. Adding the "s" is just a bad habit for many Spanish speaking natives. I even catch my boyfriend doing it at times... such as "¿ya comistes?" Some do that for most of the verbs in the "tú" preterit from. I also practice in espanglish chat, and I catch people typing it that same way...