Grammatical name of the form used before -て, -たり, -た, -たら?


I'm looking for the Japanese name of the specific verbal form used before -て,
-たり, -た, -たら:

[code]

    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
    
[/code]

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?




They are also treated as 連用形. More specifically i-type are called 連用形のイ音便.
Sometimes 音便形 is used, but there are no official name.

References

  1. [音便形 in デジタル大辞泉](http://dictionary.goo.ne.jp/leaf/jn2/34722/m0u/)
  2. [動詞の音便（おんびん） イ音便・撥音便（はつおんびん）・促音便（そくおんびん）](http://blog.livedoor.jp/aritouch/archives/2862843.html)
  3. [音便 - Wikipedia](http://ja.wikipedia.org/wiki/%E9%9F%B3%E4%BE%BF#.E5.8B.95.E8.A9.9E.E3.81.AE.E9.80.A3.E7.94.A8.E5.BD.A2.EF.BC.8B.E3.80.8C.E3.81.A6.E3.80.8D.E3.80.8C.E3.81.9F.E3.80.8D.E3.81.AA.E3.81.A9) (Note: This article uses 動詞のテ・タ形 for conveniece sake.)




They are also treated as 連用形. More specifically i-type are called 連用形のイ音便.
Sometimes 音便形 is used, but there are no official name.

References

  1. [音便形 in デジタル大辞泉](http://dictionary.goo.ne.jp/leaf/jn2/34722/m0u/)
  2. [動詞の音便（おんびん） イ音便・撥音便（はつおんびん）・促音便（そくおんびん）](http://blog.livedoor.jp/aritouch/archives/2862843.html)
  3. [音便 - Wikipedia](http://ja.wikipedia.org/wiki/%E9%9F%B3%E4%BE%BF#.E5.8B.95.E8.A9.9E.E3.81.AE.E9.80.A3.E7.94.A8.E5.BD.A2.EF.BC.8B.E3.80.8C.E3.81.A6.E3.80.8D.E3.80.8C.E3.81.9F.E3.80.8D.E3.81.AA.E3.81.A9) (Note: This article uses 動詞のテ・タ形 for conveniece sake.)

