KoreanSum

Verbs · 하다 word

시작하다 conjugation

to start; to begin · sijakada · sounds like [시자카다]

Short answer: “To start” in Korean is 시작하다 (sijakada), which also means to begin. Polite present: 시작해요 (sijakaeyo); past: 시작했어요 (sijakaesseoyo); future: 시작할 거예요. It is a 하다 verb: 하 + 아/어 always becomes 해.

Opposite: 끝내다 — to finish (something)

Note: with noun + 하다 verbs, 안 and 못 go before 하다 — 시작 안 해요, not 안 시작해요.

시작하다 in sentences

All forms of 시작하다

Present
Polite (해요) is the everyday safe choice; formal (합니다) is for news, announcements and work; casual (반말) is for close friends and younger people.
FormKoreanSounds likeRomanized
polite-아/어요시작해요[시자캐요]sijakaeyo
formal-(스)ㅂ니다시작합니다[시자캄니다]sijakamnida
casual-아/어시작해[시자캐]sijakae
plain (written)-(느)ㄴ다시작한다[시자칸다]sijakanda
formal question-(스)ㅂ니까?시작합니까?[시자캄니까]sijakamnikka?
is …ing (polite)-고 있어요시작하고 있어요[시자카고 이써요]sijakago isseoyo
Past
FormKoreanSounds likeRomanized
polite-았/었어요시작했어요[시자캐써요]sijakaesseoyo
formal-았/었습니다시작했습니다[시자캗씀니다]sijakaetseumnida
casual-았/었어시작했어[시자캐써]sijakaesseo
plain (written)-았/었다시작했다[시자캗따]sijakaetda
Future
FormKoreanSounds likeRomanized
polite — will-(으)ㄹ 거예요시작할 거예요[시자칼 꺼예요]sijakal geoyeyo
formal-(으)ㄹ 겁니다시작할 겁니다[시자칼 껌니다]sijakal geomnida
casual-(으)ㄹ 거야시작할 거야[시자칼 꺼야]sijakal geoya
formal — I will (intention)-겠습니다시작하겠습니다[시자카겓씀니다]sijakagetseumnida
Negative
FormKoreanSounds likeRomanized
not (short)안 …시작 안 해요[시작 안 해요]sijak an haeyo
did not안 …았/었어요시작 안 했어요[시작 안 해써요]sijak an haesseoyo
not (long)-지 않아요시작하지 않아요[시자카지 아나요]sijakaji anayo
cannot못 …시작 못 해요[시장 모태요]sijak mot haeyo
Honorific
Add -(으)시- when the subject is someone you respect (a teacher, a customer, an older person) — not yourself.
FormKoreanSounds likeRomanized
honorific — present-(으)세요시작하세요[시자카세요]sijakaseyo
honorific — past-(으)셨어요시작하셨어요[시자카셔써요]sijakasyeosseoyo
honorific — formal-(으)십니다시작하십니다[시자카심니다]sijakasimnida
Requests
FormKoreanSounds likeRomanized
please …-(으)세요시작하세요[시자카세요]sijakaseyo
please … (for me)-아/어 주세요시작해 주세요[시자캐 주세요]sijakae juseyo
please don’t …-지 마세요시작하지 마세요[시자카지 마세요]sijakaji maseyo
let’s … (formal)-(으)ㅂ시다시작합시다[시자캅씨다]sijakapsida
let’s … (casual)-자시작하자[시자카자]sijakaja
do … ! (casual command)-아/어라시작해라[시자캐라]sijakaera
Connecting
FormKoreanSounds likeRomanized
… and-고시작하고[시자카고]sijakago
… so / and then-아/어서시작해서[시자캐서]sijakaeseo
if …-(으)면시작하면[시자카면]sijakamyeon
… but-지만시작하지만[시자카지만]sijakajiman
because …-(으)니까시작하니까[시자카니까]sijakanikka
… and / but (background)-는데시작하는데[시자카는데]sijakaneunde
even if …-아/어도시작해도[시자캐도]sijakaedo
while …-(으)면서시작하면서[시자카면서]sijakamyeonseo
in order to …-(으)려고시작하려고[시자카려고]sijakaryeogo
(go) to …-(으)러시작하러[시자카러]sijakareo
before …-기 전에시작하기 전에[시자카기 저네]sijakagi jeone
after …-(으)ㄴ 후에시작한 후에[시자칸 후에]sijakan hue
Describing a noun
These go before a noun: “the food (that) I ate”, “a cold day”.
FormKoreanSounds likeRomanized
(that) … now-는시작하는[시자카는]sijakaneun
(that) …ed-(으)ㄴ시작한[시자칸]sijakan
(that) will …-(으)ㄹ시작할[시자칼]sijakal
Useful patterns
FormKoreanSounds likeRomanized
I want to …-고 싶어요시작하고 싶어요[시자카고 시퍼요]sijakago sipeoyo
can …-(으)ㄹ 수 있어요시작할 수 있어요[시자칼 쑤 이써요]sijakal su isseoyo
cannot …-(으)ㄹ 수 없어요시작할 수 없어요[시자칼 쑤 업써요]sijakal su eopseoyo
have to …-아/어야 해요시작해야 해요[시자캐야 해요]sijakaeya haeyo
may … / it’s OK to …-아/어도 돼요시작해도 돼요[시자캐도 돼요]sijakaedo dwaeyo
must not …-(으)면 안 돼요시작하면 안 돼요[시자카면 안 돼요]sijakamyeon an dwaeyo
…ing (noun)-기시작하기[시자카기]sijakagi

How 시작하다 changes

Every 하다 word works the same way: 하 + 여 becomes 해 → 시작해요, 시작했어요. With other endings 하 stays as it is: 시작합니다, 시작하면.

How every verb type works → · Why it sounds like that →

Questions

How do you say “start” in Korean?

“To start” is 시작하다 (sijakada), pronounced [시자카다]. In a sentence: 수업이 몇 시에 시작해요? — What time does the class start?

What is the past tense of 시작하다?

시작했어요 (sijakaesseoyo) is the polite past tense of 시작하다 (“to start”). Formal: 시작했습니다; casual: 시작했어.

How do you say 시작하다 politely?

Everyday polite: 시작해요 (sijakaeyo). Formal: 시작합니다. Casual, with close friends: 시작해.

How do you say “I want to start” in Korean?

시작하고 싶어요 (sijakago sipeoyo), pronounced [시자카고 시퍼요].

Is 시작하다 irregular?

No. Every 하다 word works the same way: 하 + 여 becomes 해 → 시작해요, 시작했어요. With other endings 하 stays as it is: 시작합니다, 시작하면.

More 하다 words like 시작하다

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Forms follow 한글 맞춤법 (Korean spelling rules); pronunciation follows 표준 발음법 and romanization follows 국어의 로마자 표기법 (Revised Romanization). Last updated October 16, 2026. How we check