お〜する details
write + humble — the speaker does for an esteemed person
o kaki suru
humble — the speaker does for an esteemed person
meaning: write
重そうですね。お持ちしましょうか。
omosou desu ne. o mochi shimashou ka.
That looks heavy — shall I carry it for you? neutral
詳細が決まり次第、こちらからお知らせいたします。
shousai ga kimarishidai, kochira kara o shirase itashimasu.
As soon as the details are finalized, we will inform you. formal
Examples
humble verb frame — presenting your own act as a service to the person you defer to
重そうですね。お持ちしましょうか。
omosou desu ne. o mochi shimashou ka.
That looks heavy — shall I carry it for you? neutral
詳細が決まり次第、こちらからお知らせいたします。
shousai ga kimarishidai, kochira kara o shirase itashimasu.
As soon as the details are finalized, we will inform you. formal
駅までお送りしますよ。
eki made o okuri shimasu yo.
I'll see you to the station. neutral
Formation
お{V-masu-stem}するattaches to ます-stem
Notes
Related patterns
Similar
Both frame an act done for another — お持ちする humbles the doer and is the safe upward form; 持ってあげる credits the doer and patronizes upward, which is exactly when speakers must switch to お〜する.
Lookalikes
Same お+stem shell, opposite vector — お〜になる raises the SUBJECT's act (先生がお読みになった, their act exalted), お〜する lowers the speaker's own act done for that person (私がお持ちします); pointing になる at yourself self-honors, the classic keigo slip.