Perfect tense endings are
added to the perfect stem, which can be found by removing the "i" from
the end of the 3rd principal part. Some verbs indicate the perfect
tense with a "v" or a "u" tense sign, while others have a vowel change
in the root or "double" the first consonant and vowel;
ALL VERBS USE THE PERFECT
PERSONAL ENDINGS SHOWN IN THIS CHART.