Verbseoul.
ㄹ stem
흔들다heundeuldato cause to dangle, shake, wave, or undulate

To say to cause to dangle, shake, wave, or undulate politely in the present tense, use 흔들어요 (heun-deu-ruh-yoh). Below is the full conjugation of 흔들다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
흔들어
heun-deu-ruh
흔들어요
heun-deu-ruh-yoh
흔듭니다
heun-deum-nee-dah
Past
흔들었어
heun-deu-ruh-ssuh
흔들었어요
heun-deu-ruh-ssuh-yoh
흔들었습니다
heun-deu-ruh-sseum-nee-dah
Future
흔들 거야
heun-deul- -guh-yah
흔들 거예요
heun-deul- -guh-yae-yoh
흔들 겁니다
heun-deul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
흔드세요
heun-deu-sae-yoh
Suggestion / Let's Polite (요)
흔들어요
heun-deu-ruh-yoh
Question Polite (요)
흔들어요?
heun-deu-ruh-yoh-?
Connective “and” — (고)
흔들고
heun-deul-goh
Conditional “if” — (면)
흔들면
heun-deul-myuhn
Noun form — (기)
흔듦
heun-deum