These verbs:

  * [いらっしゃる](http://dictionary.goo.ne.jp/leaf/jn2/15386/m0u/%E3%81%84%E3%82%89%E3%81%A3%E3%81%97%E3%82%83%E3%82%8B/)
  * [おっしゃる](http://dictionary.goo.ne.jp/leaf/jn2/31697/m0u/%E3%81%8A%E3%81%A3%E3%81%97%E3%82%83%E3%82%8B/)
  * [くださる](http://dictionary.goo.ne.jp/leaf/jn2/61762/m0u/%E3%81%8F%E3%81%A0%E3%81%95%E3%82%8B/)
  * [なさる](http://dictionary.goo.ne.jp/leaf/jn2/163920/m0u/%E3%81%AA%E3%81%95%E3%82%8B/)
  * More?

Are all listed as 五段 verbs, but they don't follow the usual conjugation rules
for them.  
For example:

  * 命令形: いらっしゃる -> いらっしゃい, not いらっしゃれ
  * 連用形: Same as above, not いらっしゃり

Is there a separate name/classification for these types of verbs? Such as カ変
for 来る and サ変 for する.
CC BY-SA 3.0
2014-06-09T07:22:30.917
17332
2023-05-22T15:04:00.457
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question
verbs
Verb classification of honorific/humble verbs
dainichi's comment in the OP is right.

These are left-overs of western dialect that are actually still used today:

**Wants** たい ー＞ とう (usually in the negative)

  * 行きたくないな・行きとうないな or 行きとうなかね

**て／た forms of 「う」verbs**

  * 何買ったの？・なんこうたと？

**General Phonetic Shift** ら行 sounds to い

  * それ何？・そいなん？
  * その人誰？・そん人だいね？
  * 二人は？・ふたいは？

**Scolding**

  * 早く行きなさいよ！・はよう行きんしゃい！

With these it's easy to see how ありがとう and いらっしゃい came about.
CC BY-SA 3.0
2014-12-28T04:06:11.573
21044
2014-12-28T04:06:11.573
8021
17332
answer