Verbseoul.
regular
가시다gasidato disappear, to fade away (of a condition or state)

To say to disappear, to fade away (of a condition or state) politely in the present tense, use 가셔요 (gah-syuh-yoh). Below is the full conjugation of 가시다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
가셔
gah-syuh
가셔요
gah-syuh-yoh
가십니다
gah-sheem-nee-dah
Past
가셨어
gah-syuh-ssuh
가셨어요
gah-syuh-ssuh-yoh
가셨습니다
gah-syuh-sseum-nee-dah
Future
가실 거야
gah-sheel- -guh-yah
가실 거예요
gah-sheel- -guh-yae-yoh
가실 겁니다
gah-sheel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
가시세요
gah-shee-sae-yoh
Suggestion / Let's Polite (요)
가셔요
gah-syuh-yoh
Question Polite (요)
가셔요?
gah-syuh-yoh-?
Connective “and” — (고)
가시고
gah-shee-goh
Conditional “if” — (면)
가시면
gah-shee-myuhn
Noun form — (기)
가심
gah-sheem