来(らい)週(しゅう) raishuuの no月(げつ)曜(よう)日(び) getsuyoubiに ni必(かなら)ず() kanarazuお()返(かえ)し() okaeshiします shimasu。 I'll definitely pay you back next Monday. Literal Next-week [possessive-の] Monday [on-に] definitely honorific-return-do. お返しします uses the お + masu-stem + します humble pattern on 返す ('to return [something]'). 必ず is an emphatic 'definitely / without fail.' A polite commitment to repay. future plansmoney and financeお~する (humble)謙譲語 (humble language)
来(らい)週(しゅう) raishuuの no月(げつ)曜(よう)日(び) getsuyoubiに ni必(かなら)ず() kanarazuお()返(かえ)し() okaeshiします shimasu。 I'll definitely pay you back next Monday. Literal Next-week [possessive-の] Monday [on-に] definitely honorific-return-do. お返しします uses the お + masu-stem + します humble pattern on 返す ('to return [something]'). 必ず is an emphatic 'definitely / without fail.' A polite commitment to repay. future plansmoney and financeお~する (humble)謙譲語 (humble language)