Verbseoul.
ㅂ irregular (adj)
가볍다gabyeopdalight (not heavy)

To say light (not heavy) politely in the present tense, use 가벼워요 (gah-byuh-wuh-yoh). Below is the full conjugation of 가볍다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
가벼워
gah-byuh-wuh
가벼워요
gah-byuh-wuh-yoh
가볍습니다
gah-byuhp-sseum-nee-dah
Past
가벼웠어
gah-byuh-wuh-ssuh
가벼웠어요
gah-byuh-wuh-ssuh-yoh
가벼웠습니다
gah-byuh-wuh-sseum-nee-dah
Future
가벼울 거야
gah-byuh-ool- -guh-yah
가벼울 거예요
gah-byuh-ool- -guh-yae-yoh
가벼울 겁니다
gah-byuh-ool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
가벼우세요
gah-byuh-oo-sae-yoh
Suggestion / Let's Polite (요)
가벼워요
gah-byuh-wuh-yoh
Question Polite (요)
가벼워요?
gah-byuh-wuh-yoh-?
Connective “and” — (고)
가볍고
gah-byuhp-goh
Conditional “if” — (면)
가벼우면
gah-byuh-oo-myuhn
Noun form — (기)
가벼움
gah-byuh-oom