Verbseoul.
하다 verb
극기하다geukgihadato practice self-control

To say to practice self-control politely in the present tense, use 극기해요 (geug-ggee-hae-yoh). Below is the full conjugation of 극기하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
극기해
geug-ggee-hae
극기해요
geug-ggee-hae-yoh
극기합니다
geug-ggee-hahm-nee-dah
Past
극기했어
geug-ggee-hae-ssuh
극기했어요
geug-ggee-hae-ssuh-yoh
극기했습니다
geug-ggee-hae-sseum-nee-dah
Future
극기할 거야
geug-ggee-hahl- -guh-yah
극기할 거예요
geug-ggee-hahl- -guh-yae-yoh
극기할 겁니다
geug-ggee-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
극기하세요
geug-ggee-hah-sae-yoh
Suggestion / Let's Polite (요)
극기해요
geug-ggee-hae-yoh
Question Polite (요)
극기해요?
geug-ggee-hae-yoh-?
Connective “and” — (고)
극기하고
geug-ggee-hah-goh
Conditional “if” — (면)
극기하면
geug-ggee-hah-myuhn
Noun form — (기)
극기함
geug-ggee-hahm