Verbseoul.
regular
뚫다ttuldato pierce a hole through, to bore through

To say to pierce a hole through, to bore through politely in the present tense, use 뚫어요 (ttoo-ruh-yoh). Below is the full conjugation of 뚫다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
뚫어
ttoo-ruh
뚫어요
ttoo-ruh-yoh
뚫습니다
ttool-seum-nee-dah
Past
뚫었어
ttoo-ruh-ssuh
뚫었어요
ttoo-ruh-ssuh-yoh
뚫었습니다
ttoo-ruh-sseum-nee-dah
Future
뚫을 거야
ttoo-reul- -guh-yah
뚫을 거예요
ttoo-reul- -guh-yae-yoh
뚫을 겁니다
ttoo-reul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
뚫으세요
ttoo-reu-sae-yoh
Suggestion / Let's Polite (요)
뚫어요
ttoo-ruh-yoh
Question Polite (요)
뚫어요?
ttoo-ruh-yoh-?
Connective “and” — (고)
뚫고
ttool-goh
Conditional “if” — (면)
뚫으면
ttoo-reu-myuhn
Noun form — (기)
뚫음
ttoo-reum