naeil hakgyoe gaya haeyo.

I have to go to school tomorrow.

Breakdown of naeil hakgyoe gaya haeyo.

• ~에: destination particle
• 학교: school
• 내일: tomorrow
• 가야 하다: to have to go

Questions & Answers about naeil hakgyoe gaya haeyo.

Why is 학교에 marked with -에?

The particle -에 indicates a destination or direction, similar to “to” in English. So 학교에 가다 literally means “go to school.”

What does 가야 해요 mean and how do I form it?

가야 해요 comes from the grammar pattern -아/어야 하다, which expresses must or have to. To form it:

1. Remove 다 from 가다 → 가-
2. Add -야 (because the stem ends in ㅏ) → 가야
3. Attach 하다, then conjugate politely → 해요
   Put together → 가야 해요 (“I have to go”).

Why can’t I just say 가요?

가요 simply states the action “go” without any obligation. By using 가야 해요, you add the meaning “must” or “have to,” indicating that the action is necessary.

Can I use 가야 돼요 instead of 가야 해요?

Yes. -아/어야 되다 is another way to express obligation. In daily speech, many Koreans say 가야 돼요. The nuance is subtle:

• 해야 해요 (하다) often feels like a personal decision.
• 해야 돼요 (되다) can imply an external necessity or social rule.
  In most contexts, they’re interchangeable.

What politeness level is the -요 ending in 가야 해요?

The -요 ending is polite informal speech (해요체). It’s suitable for conversations with strangers or acquaintances.

• More formal: 가야 합니다 (하십시오체)
• More casual: 가야 해 (no -요) for close friends or family

How do I make this sentence negative to say “don’t have to”?

Use 안 + verb stem + -아/어도 되다:
• 내일 학교에 안 가도 돼요 – “You don’t have to go to school tomorrow.”
Note: 못 가도 돼요 means “even if you can’t go,” which has a different nuance.

How do I turn this into a question to ask “Do I have to go to school tomorrow?”

You can simply raise your intonation at the end:
• 내일 학교에 가야 해요?
For higher formality, use -습니까?:
• 내일 학교에 가야 합니까?

Why is 가야 해요 conjugated in the present tense even though the obligation is for tomorrow?

In Korean, expressing obligation with -아/어야 하다 uses the present tense and relies on the time adverbial (here 내일) to show when it applies. You could add a future nuance by saying:
• 내일 학교에 가야 할 거예요 – “I will have to go to school tomorrow,” but 가야 해요 plus 내일 already makes it clear.