- Learn the intricacies of the two past tenses, the preterit and the imperfect, to perfect your story-telling skills. . When youre learning present tense conjugation, you have two things to worry about. First, you have to learn the vocab. You need to know that trabajar means . UPDATE I have many more videos on this topic on my main website. There are over 300 free videos AND exercises, many not available . Volume Two of SpanishDict.coms Learn Spanish series.