Verbseoul.
ㅂ irregular (adj)
서럽다seoreopdato be sorrowful

To say to be sorrowful politely in the present tense, use 서러워요 (suh-ruh-wuh-yoh). Below is the full conjugation of 서럽다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
서러워
suh-ruh-wuh
서러워요
suh-ruh-wuh-yoh
서럽습니다
suh-ruhp-sseum-nee-dah
Past
서러웠어
suh-ruh-wuh-ssuh
서러웠어요
suh-ruh-wuh-ssuh-yoh
서러웠습니다
suh-ruh-wuh-sseum-nee-dah
Future
서러울 거야
suh-ruh-ool- -guh-yah
서러울 거예요
suh-ruh-ool- -guh-yae-yoh
서러울 겁니다
suh-ruh-ool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
서러우세요
suh-ruh-oo-sae-yoh
Suggestion / Let's Polite (요)
서러워요
suh-ruh-wuh-yoh
Question Polite (요)
서러워요?
suh-ruh-wuh-yoh-?
Connective “and” — (고)
서럽고
suh-ruhp-goh
Conditional “if” — (면)
서러우면
suh-ruh-oo-myuhn
Noun form — (기)
서러움
suh-ruh-oom