Verbseoul.
하다 verb

감시하다 conjugation (gamsihada, to keep watch on)

To say to keep watch on politely in the present tense, use 감시해요 (gahm-shee-hae-yoh) · gamsihaeyo. Below is the full conjugation of 감시하다 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
감시해
gahm-shee-hae
gamsihae
감시해요
gahm-shee-hae-yoh
gamsihaeyo
감시합니다
gahm-shee-hahm-nee-dah
gamsihamnida
Past
감시했어
gahm-shee-hae-ssuh
gamsihaesseo
감시했어요
gahm-shee-hae-ssuh-yoh
gamsihaesseoyo
감시했습니다
gahm-shee-hae-sseum-nee-dah
gamsihaesseumnida
Future
감시할 거야
gahm-shee-hahl guh-yah
gamsihal geoya
감시할 거예요
gahm-shee-hahl guh-yae-yoh
gamsihal geoyeyo
감시할 겁니다
gahm-shee-hahl guhm-nee-dah
gamsihal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
감시하세요
gahm-shee-hah-sae-yoh
gamsihaseyo
Suggestion / Let's Polite (요)
감시해요
gahm-shee-hae-yoh
gamsihaeyo
Question Polite (요)
감시해요?
gahm-shee-hae-yoh-?
gamsihaeyo?
Connective "and" — (고)
감시하고
gahm-shee-hah-goh
gamsihago
Conditional "if" — (면)
감시하면
gahm-shee-hah-myuhn
gamsihamyeon
Progressive (고 있어요)
감시하고 있어요
gahm-shee-hah-goh ee-ssuh-yoh
gamsihago isseoyo
Want to (고 싶어요)
감시하고 싶어요
gahm-shee-hah-goh shee-puh-yoh
gamsihago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
감시할 수 있어요
gahm-shee-hahl soo ee-ssuh-yoh
gamsihal su isseoyo
Because / So (아/어서)
감시해서
gahm-shee-hae-suh
gamsihaeseo
Noun form — (기)
감시하기
gahm-shee-hah-gee
gamsihagi
Noun form — (음)
감시함
gahm-shee-hahm
gamsiham