Ser/Ir
This is the 3rd person plural conjugation of venir.
What is a vinieron.
What is the singular 3rd person (el/ella/ud) conjugation of traer
What is trajo.
This is the English translation to this sentence: Yo estuve triste.
What is I was sad.
The full conjugation to ser/ir in irregular preterite form.
What is fui, fuiste, fue, fuimos, fuistes, fueron.