Verb classification of honorific/humble verbs


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.




I'd like to point out that those verbs also have "regular" forms of 連体形 and
命令形 even though not used quite often. As an extreme example, when making up
the expression 連用中止法, they must be conjugated regularly to 連用形.

> 本日はご来場くださり、誠にありがとうございます。 "Thank you very much for coming today."

but 「本日はご来場ください、誠にありがとうございます」 makes no sense.

Therefore, people tend to think those verbs aren't very different from regular
五段 verbs, and try to account for their irregular forms by phonetic change
(both forms) or sometimes by suppletion (only 命令形).

Phonetic change (reduction of R): kudasari > kudasai, kudasare > kudasae >
kudasai

Suppletion: in this idea, ください is seen as short for the imperative expression
くださいませ, which is a combination of the verb くださる in irregular 連用形 and the
auxiliary verb ます in 命令形.

