Verbseoul.
하다 verb
통하다tonghadato pass through, from one end to the other

To say to pass through, from one end to the other politely in the present tense, use 통해요 (tohng-hae-yoh). Below is the full conjugation of 통하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
통해
tohng-hae
통해요
tohng-hae-yoh
통합니다
tohng-hahm-nee-dah
Past
통했어
tohng-hae-ssuh
통했어요
tohng-hae-ssuh-yoh
통했습니다
tohng-hae-sseum-nee-dah
Future
통할 거야
tohng-hahl- -guh-yah
통할 거예요
tohng-hahl- -guh-yae-yoh
통할 겁니다
tohng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
통하세요
tohng-hah-sae-yoh
Suggestion / Let's Polite (요)
통해요
tohng-hae-yoh
Question Polite (요)
통해요?
tohng-hae-yoh-?
Connective “and” — (고)
통하고
tohng-hah-goh
Conditional “if” — (면)
통하면
tohng-hah-myuhn
Noun form — (기)
통함
tohng-hahm