I'm looking for the Japanese name of the specific verbal form used before -て, -たり, -た, -たら:
verb → 連用形 ren.yōkei → XXXX → + -て, -たり, -た, -たら
書く → 書き → 書い → 書いて, 書いたり, 書いた, 書いたら
I assume this verbal form is derived from the 連用形{れんようけい}, with specific phonetic modifications for godan verbs. (see Shimamori Reiko, Grammaire japonaise systématique.1.48 (my translation): "-て, -たり, -た, -たら are preceded by the connective base of the verb, [...] yodan verbs [...] being deeply modified [by the suffix]")
So, what's the name standing for "XXXX"? Something like "-t" form?