Verbseoul.
하다 verb
이해하다ihaehadato understand or comprehend

To say to understand or comprehend politely in the present tense, use 이해해요 (ee-hae-hae-yoh). Below is the full conjugation of 이해하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
이해해
ee-hae-hae
이해해요
ee-hae-hae-yoh
이해합니다
ee-hae-hahm-nee-dah
Past
이해했어
ee-hae-hae-ssuh
이해했어요
ee-hae-hae-ssuh-yoh
이해했습니다
ee-hae-hae-sseum-nee-dah
Future
이해할 거야
ee-hae-hahl- -guh-yah
이해할 거예요
ee-hae-hahl- -guh-yae-yoh
이해할 겁니다
ee-hae-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
이해하세요
ee-hae-hah-sae-yoh
Suggestion / Let's Polite (요)
이해해요
ee-hae-hae-yoh
Question Polite (요)
이해해요?
ee-hae-hae-yoh-?
Connective “and” — (고)
이해하고
ee-hae-hah-goh
Conditional “if” — (면)
이해하면
ee-hae-hah-myuhn
Noun form — (기)
이해함
ee-hae-hahm