Verbseoul.
ㅅ irregular
잇다itda-3to join, to piece together, to connect

To say to join, to piece together, to connect politely in the present tense, use 이어요 (ee-uh-yoh). Below is the full conjugation of 잇다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
이어
ee-uh
이어요
ee-uh-yoh
잇습니다
eet-seum-nee-dah
Past
이었어
ee-uh-ssuh
이었어요
ee-uh-ssuh-yoh
이었습니다
ee-uh-sseum-nee-dah
Future
이을 거야
ee-eul- -guh-yah
이을 거예요
ee-eul- -guh-yae-yoh
이을 겁니다
ee-eul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
이으세요
ee-eu-sae-yoh
Suggestion / Let's Polite (요)
이어요
ee-uh-yoh
Question Polite (요)
이어요?
ee-uh-yoh-?
Connective “and” — (고)
잇고
eet-goh
Conditional “if” — (면)
이으면
ee-eu-myuhn
Noun form — (기)
이음
ee-eum