Verbseoul.
하다 verb
낙하하다nakhahadato fall

To say to fall politely in the present tense, use 낙하해요 (nah-kah-hae-yoh). Below is the full conjugation of 낙하하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
낙하해
nah-kah-hae
낙하해요
nah-kah-hae-yoh
낙하합니다
nah-kah-hahm-nee-dah
Past
낙하했어
nah-kah-hae-ssuh
낙하했어요
nah-kah-hae-ssuh-yoh
낙하했습니다
nah-kah-hae-sseum-nee-dah
Future
낙하할 거야
nah-kah-hahl- -guh-yah
낙하할 거예요
nah-kah-hahl- -guh-yae-yoh
낙하할 겁니다
nah-kah-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
낙하하세요
nah-kah-hah-sae-yoh
Suggestion / Let's Polite (요)
낙하해요
nah-kah-hae-yoh
Question Polite (요)
낙하해요?
nah-kah-hae-yoh-?
Connective “and” — (고)
낙하하고
nah-kah-hah-goh
Conditional “if” — (면)
낙하하면
nah-kah-hah-myuhn
Noun form — (기)
낙하함
nah-kah-hahm