イ音便 Outside of the て and た Forms


I understand that a lot of the time the consonants in き, ぎ, し and り were
dropped, making 書きて into 書いて, 焼き刃 into やいば, 良し into 良い, etc. When it comes to
verbs, it affected their て form as well as た/たら/たり, did it affect other uses
of the 連用形?

Like how 引き+越す gives us 引っ越す, K+K geminates regularly in the same way that 積+極
becomes せっきょく. But I can't find any instances of イ音便 in verbal compounds, and
it doesn't happen with たい either. Why's that?




This
[presentation](http://www.kyorin-u.ac.jp/univ/user/foreign/nikodebu/lectures\(PDF\)/2-4.pdf),
which is based on a book titled 日本語構造伝達文法・発展Ａ, touches upon why 音便 doesn’t
happen in the たい-form (e.g. 書きたい).

If my interpretation is correct, the reason the /t/ sound doesn't affect the
sound of the preceding verb in the たい-form is that たい, as a semantic unit to
express the subject’s desire that the event described by the verb
materializes, is more independent from, and therefore, less closely associated
with the verb than the て of the て-form, which, as an aspect marker, is a more
integral part of the verb itself. Thus, 書きて (before 音便) forms one unbreakable
semantic unit, so to speak, whereas 書きたい doesn't, and energy-saving phonetic
changes, such as that from 書きて to 書いて, don’t easily transcend boundaries of
such units.




This
[presentation](http://www.kyorin-u.ac.jp/univ/user/foreign/nikodebu/lectures\(PDF\)/2-4.pdf),
which is based on a book titled 日本語構造伝達文法・発展Ａ, touches upon why 音便 doesn’t
happen in the たい-form (e.g. 書きたい).

If my interpretation is correct, the reason the /t/ sound doesn't affect the
sound of the preceding verb in the たい-form is that たい, as a semantic unit to
express the subject’s desire that the event described by the verb
materializes, is more independent from, and therefore, less closely associated
with the verb than the て of the て-form, which, as an aspect marker, is a more
integral part of the verb itself. Thus, 書きて (before 音便) forms one unbreakable
semantic unit, so to speak, whereas 書きたい doesn't, and energy-saving phonetic
changes, such as that from 書きて to 書いて, don’t easily transcend boundaries of
such units.

