Verbseoul.
ㄹ stem
덜다deoldato subtract

To say to subtract politely in the present tense, use 덜어요 (duh-ruh-yoh). Below is the full conjugation of 덜다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
덜어
duh-ruh
덜어요
duh-ruh-yoh
덥니다
duhm-nee-dah
Past
덜었어
duh-ruh-ssuh
덜었어요
duh-ruh-ssuh-yoh
덜었습니다
duh-ruh-sseum-nee-dah
Future
덜 거야
duhl- -guh-yah
덜 거예요
duhl- -guh-yae-yoh
덜 겁니다
duhl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
더세요
duh-sae-yoh
Suggestion / Let's Polite (요)
덜어요
duh-ruh-yoh
Question Polite (요)
덜어요?
duh-ruh-yoh-?
Connective “and” — (고)
덜고
duhl-goh
Conditional “if” — (면)
덜면
duhl-myuhn
Noun form — (기)
duhm