Verbseoul.
ㅂ irregular (adj)
무섭다museopdato be worried, scared or afraid of something

To say to be worried, scared or afraid of something politely in the present tense, use 무서워요 (moo-suh-wuh-yoh). Below is the full conjugation of 무섭다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
무서워
moo-suh-wuh
무서워요
moo-suh-wuh-yoh
무섭습니다
moo-suhp-sseum-nee-dah
Past
무서웠어
moo-suh-wuh-ssuh
무서웠어요
moo-suh-wuh-ssuh-yoh
무서웠습니다
moo-suh-wuh-sseum-nee-dah
Future
무서울 거야
moo-suh-ool- -guh-yah
무서울 거예요
moo-suh-ool- -guh-yae-yoh
무서울 겁니다
moo-suh-ool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
무서우세요
moo-suh-oo-sae-yoh
Suggestion / Let's Polite (요)
무서워요
moo-suh-wuh-yoh
Question Polite (요)
무서워요?
moo-suh-wuh-yoh-?
Connective “and” — (고)
무섭고
moo-suhp-goh
Conditional “if” — (면)
무서우면
moo-suh-oo-myuhn
Noun form — (기)
무서움
moo-suh-oom