Verbseoul.
하다 verb
확대하다hwakdaehadato expand

To say to expand politely in the present tense, use 확대해요 (hwahg-dae-hae-yoh). Below is the full conjugation of 확대하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
확대해
hwahg-dae-hae
확대해요
hwahg-dae-hae-yoh
확대합니다
hwahg-dae-hahm-nee-dah
Past
확대했어
hwahg-dae-hae-ssuh
확대했어요
hwahg-dae-hae-ssuh-yoh
확대했습니다
hwahg-dae-hae-sseum-nee-dah
Future
확대할 거야
hwahg-dae-hahl- -guh-yah
확대할 거예요
hwahg-dae-hahl- -guh-yae-yoh
확대할 겁니다
hwahg-dae-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
확대하세요
hwahg-dae-hah-sae-yoh
Suggestion / Let's Polite (요)
확대해요
hwahg-dae-hae-yoh
Question Polite (요)
확대해요?
hwahg-dae-hae-yoh-?
Connective “and” — (고)
확대하고
hwahg-dae-hah-goh
Conditional “if” — (면)
확대하면
hwahg-dae-hah-myuhn
Noun form — (기)
확대함
hwahg-dae-hahm