Imperfect and/or durative verbs receive the verb zol between the negative particle and the verb, inflected only for tense; the same tense as the main verb. I suppose this counts as affecting the finiteness of the verb; there is no real non-finite form of verbs. Negated imperfect/durative verbs still show the same information as they would in an affirmative situation.

Ta zol bashyawkvj.
/ta ʂol ba.ʃjaw.kədʒ/
ɴᴇɢ ᴄᴏᴘ 1.ᴘʟ.ᴇxᴄ.ᴀʙs-blood-drink
“We don’t drink blood.”