Múlt idő

Hungarian has one past tense, and it is built from one marker plus the same personal endings you already know the shape of.

The marker is -t or -tt, attached to the verb stem. Then the endings: -tam/-tem, -tál/-tél, — (bare stem for ő), -tunk/-tünk, -tatok/-tetek, -tak/-tek. Using tanul "learn": tanultam, tanultál, tanult, tanultunk, tanultatok, tanultak.

Whether the marker is -t or -tt, and whether a linking vowel appears (-ott/-ett/-ött), depends on the verb's shape — one-syllable verbs and verbs ending in two consonants usually take the linking vowel: néz → nézett, mond → mondott. Multi-syllable verbs ending in one consonant usually just take -t: vásárol → vásárolt, beszél → beszélt. Learn the common ones as whole forms; the rule has too many edges to trust cold.

"Was" is irregular and essential: *volt*. Tegnap otthon voltam. Nem volt időm. Hol voltál? You will use volt more than any other past-tense verb, so start here.