Verbseoul.
하다 verb
수영하다suyeonghadato swim (move through water)

To say to swim (move through water) politely in the present tense, use 수영해요 (soo-yuhng-hae-yoh). Below is the full conjugation of 수영하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
수영해
soo-yuhng-hae
수영해요
soo-yuhng-hae-yoh
수영합니다
soo-yuhng-hahm-nee-dah
Past
수영했어
soo-yuhng-hae-ssuh
수영했어요
soo-yuhng-hae-ssuh-yoh
수영했습니다
soo-yuhng-hae-sseum-nee-dah
Future
수영할 거야
soo-yuhng-hahl- -guh-yah
수영할 거예요
soo-yuhng-hahl- -guh-yae-yoh
수영할 겁니다
soo-yuhng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
수영하세요
soo-yuhng-hah-sae-yoh
Suggestion / Let's Polite (요)
수영해요
soo-yuhng-hae-yoh
Question Polite (요)
수영해요?
soo-yuhng-hae-yoh-?
Connective “and” — (고)
수영하고
soo-yuhng-hah-goh
Conditional “if” — (면)
수영하면
soo-yuhng-hah-myuhn
Noun form — (기)
수영함
soo-yuhng-hahm