Verbseoul.
ㄹ stem
병들다byeongdeuldato fall ill/sick, to become ill

To say to fall ill/sick, to become ill politely in the present tense, use 병들어요 (byuhng-deu-ruh-yoh). Below is the full conjugation of 병들다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
병들어
byuhng-deu-ruh
병들어요
byuhng-deu-ruh-yoh
병듭니다
byuhng-deum-nee-dah
Past
병들었어
byuhng-deu-ruh-ssuh
병들었어요
byuhng-deu-ruh-ssuh-yoh
병들었습니다
byuhng-deu-ruh-sseum-nee-dah
Future
병들 거야
byuhng-deul- -guh-yah
병들 거예요
byuhng-deul- -guh-yae-yoh
병들 겁니다
byuhng-deul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
병드세요
byuhng-deu-sae-yoh
Suggestion / Let's Polite (요)
병들어요
byuhng-deu-ruh-yoh
Question Polite (요)
병들어요?
byuhng-deu-ruh-yoh-?
Connective “and” — (고)
병들고
byuhng-deul-goh
Conditional “if” — (면)
병들면
byuhng-deul-myuhn
Noun form — (기)
병듦
byuhng-deum