Page 398 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

324 o - kudasai
The sentence in (3), however, is acceptable. This sentence is derived
from the sentence in (4) ; in (3) the direct object marker o has been
deleted.
(3) ~~&Z%TSL\~
(Please give me a call tonight.)

3. 0 - kudasai cannot be used in negative requests.
(5) *zo>~;.ikk;@k~hb~?I-TS~~~
(Please do not use this pen.)

0 - kudasai is politer than - kudasai. While there are some verbs which can-
not be used in the o - kudasai pattern as mentioned in Notes 1 and 2, any
verb can be used in the - kudasai pattern.

(Please look at it.)

b. LTTSb'/*%LTSbl,
(Please do it.)
c. t$%T I%RLICTS~~/%R~SQTTS~~/??%%RTS
b~lo
(Please clean up by yourself.)
Note also that - kudasai can be used to make negative requests, but
o - kudasai cannot, as in [2].

In addition, - kudasai can be used with auxiliary verbs which require verb
te-forms while o - kudasai cannot.
[31 a. BT~~QTTS~~ / *%RTbl 3TSbl,
(Please look at it before you go.)