Verbseoul.
하다 verb
증가하다jeunggahadato increase or add

To say to increase or add politely in the present tense, use 증가해요 (cheung-gah-hae-yoh). Below is the full conjugation of 증가하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
증가해
cheung-gah-hae
증가해요
cheung-gah-hae-yoh
증가합니다
cheung-gah-hahm-nee-dah
Past
증가했어
cheung-gah-hae-ssuh
증가했어요
cheung-gah-hae-ssuh-yoh
증가했습니다
cheung-gah-hae-sseum-nee-dah
Future
증가할 거야
cheung-gah-hahl- -guh-yah
증가할 거예요
cheung-gah-hahl- -guh-yae-yoh
증가할 겁니다
cheung-gah-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
증가하세요
cheung-gah-hah-sae-yoh
Suggestion / Let's Polite (요)
증가해요
cheung-gah-hae-yoh
Question Polite (요)
증가해요?
cheung-gah-hae-yoh-?
Connective “and” — (고)
증가하고
cheung-gah-hah-goh
Conditional “if” — (면)
증가하면
cheung-gah-hah-myuhn
Noun form — (기)
증가함
cheung-gah-hahm