Verbseoul.
하다 verb

차단하다 conjugation (chadanhada, to block)

To say to block politely in the present tense, use 차단해요 (chah-dahn-hae-yoh) · chadanhaeyo. Below is the full conjugation of 차단하다 across the three tenses and three everyday speech levels.

Grammar note (하다 verb): 하다 verbs are formed with a Sino-Korean noun + 하다 (e.g. 공부하다 = study + do). 하다 conjugates irregularly: the ㅏ in 하 contracts with the -아/-어 suffix to give 해 (not *하어). Present polite: 해요; past polite: 했어요. The formal ending is 합니다 (not *하습니다). Most noun+하다 compounds follow this pattern uniformly. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
차단해
chah-dahn-hae
chadanhae
차단해요
chah-dahn-hae-yoh
chadanhaeyo
차단합니다
chah-dahn-hahm-nee-dah
chadanhamnida
Past
차단했어
chah-dahn-hae-ssuh
chadanhaesseo
차단했어요
chah-dahn-hae-ssuh-yoh
chadanhaesseoyo
차단했습니다
chah-dahn-hae-sseum-nee-dah
chadanhaesseumnida
Future
차단할 거야
chah-dahn-hahl guh-yah
chadanhal geoya
차단할 거예요
chah-dahn-hahl guh-yae-yoh
chadanhal geoyeyo
차단할 겁니다
chah-dahn-hahl guhm-nee-dah
chadanhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
차단하세요
chah-dahn-hah-sae-yoh
chadanhaseyo
Suggestion / Let's Polite (요)
차단해요
chah-dahn-hae-yoh
chadanhaeyo
Question Polite (요)
차단해요?
chah-dahn-hae-yoh-?
chadanhaeyo?
Connective "and" — (고)
차단하고
chah-dahn-hah-goh
chadanhago
Conditional "if" — (면)
차단하면
chah-dahn-hah-myuhn
chadanhamyeon
Progressive (고 있어요)
차단하고 있어요
chah-dahn-hah-goh ee-ssuh-yoh
chadanhago isseoyo
Want to (고 싶어요)
차단하고 싶어요
chah-dahn-hah-goh shee-puh-yoh
chadanhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
차단할 수 있어요
chah-dahn-hahl soo ee-ssuh-yoh
chadanhal su isseoyo
Because / So (아/어서)
차단해서
chah-dahn-hae-suh
chadanhaeseo
Noun form — (기)
차단하기
chah-dahn-hah-gee
chadanhagi
Noun form — (음)
차단함
chah-dahn-hahm
chadanham