Most Spanish verbs are regular in the preterite tense. The Spanish preterite tense is used to describe completed actions in the past. For example: Fui al cine ayer. - I went to the cinema yesterday.
Normally in the past tense, you do not need to worry about subject-verb agreement because you can conjugate most regular past tense verbs to the singular or plural by adding an -ed to the end of the ...