Verbseoul.
하다 verb
거짓말하다geojitmalhadato lie

To say to lie politely in the present tense, use 거짓말해요 (guh-cheen-mahl-hae-yoh). Below is the full conjugation of 거짓말하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
거짓말해
guh-cheen-mahl-hae
거짓말해요
guh-cheen-mahl-hae-yoh
거짓말합니다
guh-cheen-mahl-hahm-nee-dah
Past
거짓말했어
guh-cheen-mahl-hae-ssuh
거짓말했어요
guh-cheen-mahl-hae-ssuh-yoh
거짓말했습니다
guh-cheen-mahl-hae-sseum-nee-dah
Future
거짓말할 거야
guh-cheen-mahl-hahl- -guh-yah
거짓말할 거예요
guh-cheen-mahl-hahl- -guh-yae-yoh
거짓말할 겁니다
guh-cheen-mahl-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
거짓말하세요
guh-cheen-mahl-hah-sae-yoh
Suggestion / Let's Polite (요)
거짓말해요
guh-cheen-mahl-hae-yoh
Question Polite (요)
거짓말해요?
guh-cheen-mahl-hae-yoh-?
Connective “and” — (고)
거짓말하고
guh-cheen-mahl-hah-goh
Conditional “if” — (면)
거짓말하면
guh-cheen-mahl-hah-myuhn
Noun form — (기)
거짓말함
guh-cheen-mahl-hahm