Page 394 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

320 o - da / o hajirne (to shite)
2. 0 - da cannot be used with two-syllable Gr. 2 verbs (e.g., rniru 'look at,y
iru 'stay,' kiru 'wear,' neru 'sleep') and irregular verbs (i.e., suru 'do3
and kuru 'come').

3. As Formation (ii) shows, for suru-verbs which require the polite prefix
go-, go VN da is used rather than o Vrnasu da. The sum-verbs which
require the polite prefix o-, such as s6jisuru 'clean,' denwasuru 'make a
call,' ry6risuru 'cook,' and sentakusuru 'wash' are not commonly used
in this pattern.
Dt ll
(3) a. ??%~;~'S-AT~EBS%~I~~ (Acceptable form: &4
flS-AT&BE%@ELT {&%ha / 6\59 L?6l0)
(The teacher is cleaning the room by himself.)

(+ o- (DBJG: 34347))

0 - da is not as polite as o - ni naru but is politer than passive honorific
-
forms.
(+Politeness and Formality (DBJG: 36-44); o - ni naru (DBJG: 358-60);
rarerul (DBJG: 364-69))

@I
o hajime (to shite) j.2 lt C ( 2 L 7) phr. <w>

a phrase that is used to give a pri- starting with; not only - but
mary example dm-
[REL. - dake de (wa)naku - (mo)]