Verbseoul.
하다 verb
착륙하다chakryukhadato land, to set down

To say to land, to set down politely in the present tense, use 착륙해요 (chahng-nyoo-kae-yoh). Below is the full conjugation of 착륙하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
착륙해
chahng-nyoo-kae
착륙해요
chahng-nyoo-kae-yoh
착륙합니다
chahng-nyoo-kahm-nee-dah
Past
착륙했어
chahng-nyoo-kae-ssuh
착륙했어요
chahng-nyoo-kae-ssuh-yoh
착륙했습니다
chahng-nyoo-kae-sseum-nee-dah
Future
착륙할 거야
chahng-nyoo-kahl- -guh-yah
착륙할 거예요
chahng-nyoo-kahl- -guh-yae-yoh
착륙할 겁니다
chahng-nyoo-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
착륙하세요
chahng-nyoo-kah-sae-yoh
Suggestion / Let's Polite (요)
착륙해요
chahng-nyoo-kae-yoh
Question Polite (요)
착륙해요?
chahng-nyoo-kae-yoh-?
Connective “and” — (고)
착륙하고
chahng-nyoo-kah-goh
Conditional “if” — (면)
착륙하면
chahng-nyoo-kah-myuhn
Noun form — (기)
착륙함
chahng-nyoo-kahm