Korean Grammar : ‘-니?’, ‘-자’, and ‘-아/어 보이다’
Table of Contents
- Introduction
- ‘-니?’ (-ni?)
- ‘-자’ (-ja)
- ‘-아/어 보이다’ (-a/eo boida)
- Practice Examples
- Common Mistakes
- Summary
1. Introduction
Understanding these three Korean grammar patterns is essential for natural communication. Each serves a unique purpose in expressing questions, suggestions, and appearances/impressions.
2. ‘-니?’ (-ni?)
Basic Function
‘-니?’ is a question ending that can be both casual and semi-formal, depending on the context.
Usage Types
- Direct Questions
- 밥 먹었니? (bap meogeoss-ni?)
- “Did you eat?”
- Pronunciation: [bap məːgɛsːni]
- Rhetorical Questions
- 이게 말이 되니? (ige mali doeni?)
- “Does this make sense?”
- Pronunciation: [igɛ mali dweni]
Level of Formality
- More casual than ‘-습니까?’
- Used with people of equal or lower status
- Often used by:
- Teachers to students
- Parents to children
- Close friends
Common Patterns
- Present Tense
- 공부하니? (gongbuhani?)
- “Are you studying?”
- Pronunciation: [goŋbuhani]
- Past Tense
- 갔었니? (gass-eoss-ni?)
- “Did you go?”
- Pronunciation: [gasːɛsːni]
3. ‘-자’ (-ja)
Basic Function
‘-자’ is used to make suggestions or proposals for group activities.
Usage Types
- Simple Suggestions
- 영화 보자 (yeonghwa boja)
- “Let’s watch a movie”
- Pronunciation: [jəŋhwa bodʒa]
- Immediate Actions
- 가자 (gaja)
- “Let’s go”
- Pronunciation: [kadʒa]
Formality Level
- Casual to semi-formal
- Used among:
- Friends
- Family members
- Peers
Common Patterns
- Basic Form
- 먹자 (meogja)
- “Let’s eat”
- Pronunciation: [məkʨa]
- With Location
- 공원에 가자 (gongwon-e gaja)
- “Let’s go to the park”
- Pronunciation: [goŋwone gadʒa]
4. ‘-아/어 보이다’ (-a/eo boida)
Basic Function
This pattern is used to express how something or someone appears or seems.
Usage Rules
- Vowel Harmony
- After ㅏ, ㅗ → -아 보이다
- After other vowels → -어 보이다
- Structure
- Adjective stem + -아/어 보이다
Common Examples
- With Appearances
- 예뻐 보이다 (yeppeo boida)
- “Looks pretty”
- Pronunciation: [jepʰə boida]
- With Conditions
- 피곤해 보이다 (pigonhae boida)
- “Looks tired”
- Pronunciation: [pʰigonhɛ boida]
5. Practice Examples
‘-니?’ Examples
- Basic Questions
- 학교에 가니? (hakgyo-e gani?)
- “Are you going to school?”
- Confirmation Questions
- 이해했니? (ihaehavssni?)
- “Did you understand?”
‘-자’ Examples
- Simple Activities
- 커피 마시자 (keopi masija)
- “Let’s drink coffee”
- Complex Suggestions
- 주말에 등산하자 (jumal-e deungsanhaja)
- “Let’s go hiking on the weekend”
‘-아/어 보이다’ Examples
- Physical Appearances
- 날씨가 추워 보이다 (nalssiga chuwo boida)
- “The weather looks cold”
- Emotional States
- 행복해 보이다 (haengbokhae boida)
- “Looks happy”
6. Common Mistakes
‘-니?’ Mistakes
- Using with Honorific Forms
- Incorrect: 계시니? (gyesini?)
- Correct: 있니? (issni?)
- Using with Formal Situations
- Avoid using with superiors or strangers
‘-자’ Mistakes
- Using for Personal Decisions
- Incorrect: 나 자러 가자 (na jareo gaja)
- Correct: 나 자러 갈게 (na jareo galge)
- Using with Honorific Situations
- Should use more formal alternatives like ‘-시죠’
‘-아/어 보이다’ Mistakes
- Vowel Harmony Errors
- Incorrect: 작어 보이다
- Correct: 작아 보이다
- Direct Experience Confusion
- Don’t use for personal experiences
7. Practice Exercises
Exercise 1: ‘-니?’
Complete these sentences:
- 뭐 하_? (What are you doing?)
- 배고프_? (Are you hungry?)
Exercise 2: ‘-자’
Transform these sentences into suggestions:
- 영화 보다 → _
- 한국어 공부하다 → _
Exercise 3: ‘-아/어 보이다’
Add the correct form:
- 좋다 → _
- 맛있다 → _
8. Real-Life Applications
In Daily Conversations
- ‘-니?’
- 오늘 기분이 어떠니? (oneul gibun-i eottaeoni?)
- “How are you feeling today?”
- ‘-자’
- 이번 주말에 놀러 가자 (ibeon jumal-e nolleo gaja)
- “Let’s go out this weekend”
- ‘-아/어 보이다’
- 이 옷이 비싸 보여요 (i osi bissa boyeoyo)
- “These clothes look expensive”
In Various Situations
- School/Work
- 숙제 다 했니? (sukje da haessni?)
- “Did you finish your homework?”
- Social Settings
- 같이 점심 먹자 (gachi jeomsim meogja)
- “Let’s have lunch together”
- Observations
- 그 사람이 친절해 보여요 (geu saram-i chinjeolhae boyeoyo)
- “That person looks kind”
9. Additional Tips
For Better Communication
- Tone and Context
- Consider the relationship with the listener
- Pay attention to the situation
- Choose appropriate formality level
- Cultural Considerations
- Respect age and social hierarchy
- Understanding informal vs. formal situations
- Group harmony in suggestions
10. Summary
Key Points to Remember
- ‘-니?’
- Casual question ending
- Used with close relationships
- Shows interest or concern
- ‘-자’
- Suggestion for group activities
- Inclusive and friendly
- Casual but can be polite
- ‘-아/어 보이다’
- Expresses appearances
- Based on visual observation
- Follows vowel harmony rules
Conclusion
Mastering these grammar patterns will significantly improve your Korean communication skills. Remember that practice and exposure to natural Korean conversations are key to using these patterns effectively.
Consider these patterns as tools in your Korean language toolkit, each serving specific purposes in different social contexts. Continue practicing and observing how native speakers use them in various situations.

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