Verbseoul.
하다 verb
기초하다gichohadato be based on

To say to be based on politely in the present tense, use 기초해요 (gee-choh-hae-yoh). Below is the full conjugation of 기초하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
기초해
gee-choh-hae
기초해요
gee-choh-hae-yoh
기초합니다
gee-choh-hahm-nee-dah
Past
기초했어
gee-choh-hae-ssuh
기초했어요
gee-choh-hae-ssuh-yoh
기초했습니다
gee-choh-hae-sseum-nee-dah
Future
기초할 거야
gee-choh-hahl- -guh-yah
기초할 거예요
gee-choh-hahl- -guh-yae-yoh
기초할 겁니다
gee-choh-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
기초하세요
gee-choh-hah-sae-yoh
Suggestion / Let's Polite (요)
기초해요
gee-choh-hae-yoh
Question Polite (요)
기초해요?
gee-choh-hae-yoh-?
Connective “and” — (고)
기초하고
gee-choh-hah-goh
Conditional “if” — (면)
기초하면
gee-choh-hah-myuhn
Noun form — (기)
기초함
gee-choh-hahm