These verbs are made past tense with 2 things - sundóma douplication and a nasal suffix.
The nasal suffix -n is for I-verbs that end in stops (B, D, G), but it's not as simple as you would hope. The -n mutates the consonant it is attached to.
| Ending | → | Result | Intervocalic |
|---|---|---|---|
| B | → | MP | -MM- |
| D | → | NT | -NN- |
| G | → | NC | -NG- |
But these aren't the only changes that occur. Take the vowel of the root, called the sundóma (plural sundómar) and put a copy of it before the root-if the root starts with a consonant. Because of this, the following consonant is put under Vocalic Mutation.
Heb- → Echemp it kept
Mad- → Avant it ate
Gad- → Ant it caught (the G mutates to nothing, leaving the sundóma at the beginning of the word)
Tog- → Udunc it led
Tob- → Odomp It covered
As you can see, finding the sundóma isn't always so simple. Some Os will become Us, because in ancient times they were Us. To know this, you must go back to the ancient root. Tog- is from the ancient word tuk-, and tob- is from the ancient root top-. I will always mark in wordlists the unclear sundómar.
You don't have to worry about this with Continuant I-Verbs because it's the addition of the -n- that preserves the U.
To add a pronominal suffix to the verb, add an -i to the end. This will cause I-affection in the vowels preceding it, and it would make the nasalized consonants intervocalic. Finally, add the pronoun suffix onto the -i.
Echemp → Echemmin I kept
Avant → Evennif we, not you, ate
Ant → Enninc you and I caught
Udunc → Ydyngig you led
Odomp → Edemmir they covered