Body
Perfect
The perfect system (for both the indicative and subjunctive moods) includes the perfect, pluperfect and future perfect tenses in both the active and the passive voice. Each tense has a "pastness" about it: we translate the perfect either using "has" or "have" (I have walked, he has walked), "did" (I did walk), or simply just with "-ed" (I walked). We translate the pluperfect using "had" (I had walked). We translate the future perfect as "will have" (by tomorrow, I will have walked 5 miles).
This system is formed from the 3rd principle part. First you find the perfect stem (the 3rd principle part minus the final "i"), then you add the appropriate endings.
