penultimate, rising tone) → nùbaudė, nebenùbaudė etc. vìrti (to boil, monosyllabic stem verb) → vìrė (stress on the penultimate, short vowel) → ìšvirė, nebeišsìvirė etc. kláusti (to ask, monosyllabic stem verb) → kláusė (stress on the penultimate, falling tone, the rule does not apply) → pakláusė darýti (to ask, suffixal verb, the rule does not apply) → dãrė (stress on the penultimate, rising tone) → padãrė Some present tense forms (primary or mixed stem), but only if the stress of the 3rd person falls on its penultimate syllable, this syllable is not a suffix and has a short vowel or a rising tone: kalbė́ti (to speak, suffixal verb) → kal̃ba (stress on the penultimate, no suffix, rising tone) → sùkalba, tebesìkalba etc. sukti (to turn, primary verb) → sùka (stress on the penultimate, no suffix, short vowel) → pàsuka, nèsuka etc. Past simple accent retraction is regular, present tense accent retraction is sporadic. If a particular verb retracts its accent in one tense, it does not mean that the other tense will follow suit. The accent retraction does not depend on a particular prefix (except for per-) and will systematically happen with every other prefixed structure (a prefix, a ne- type prefix or a reflexive formant). It means that even if dictionaries never include ne- type prefixes, the stress retraction can be deduced from other prefixed forms that dictionaries do include: plaũkti (to swim) → išplaũkti (to swim out) → išplaũkia (no retraction, hence: neišplaũkia, teišplaũkia etc.) riñkti (to gather) → suriñkti (to gather them all) → sùrenka (retraction does happen, hence: nèrenka, tèrenka etc.) The latter rule has two exceptions: turė́ti (to have) → suturė́ti (to restrain) → sùturi (retraction does happen, but not for ne- type prefixes of the non-prefixed verbs: netùri, tetùri etc.) galė́ti (to be able) → išgalė́ti (to afford) → ìšgali (retraction does happen, but not for ne- type prefixes of the non-prefixed verbs: negãli, begãli etc.) The prefix pér- always has the falling tone and takes the stress in all parts of speech of that word, ignoring all the other accentuation rules: pérduoti – to transmit, nebepérsivalgymas – the inability to overeat. Stem classes The below given tables are not a full collection of types of conjugation, there can be types in language not included here. Consonants d, t become s before t in any case in language. In verbs this occurs before a