B1 · Intermediate Chapter 11

Observations and Deductions

5 Total Rules
54 examples
5 min
Rules in This Chapter Quick Practice

Chapter in 30 Seconds

Master the art of observation, deduction, and storytelling to sound like a native Korean speaker.

  • Interpret visual and auditory signs to make confident guesses about others.
  • Share personal discoveries and past experiences using retrospective markers.
  • Describe behaviors like pretending or following instructions precisely.
Decode the world around you in fluent Korean.

What You'll Learn

Hey there! Ready to speak Korean like a true native? In this chapter, we're diving deep into the subtle world of observation and deduction. No more simple sentences when you want to talk about what you've seen or what you think is true. With expressions like «-나 보다,» you'll learn how to make precise guesses about others based on visual or auditory evidence. For example, when you see your friend with red eyes, you'll be able to say, "It seems like they didn't sleep well last night." This isn't just a simple guess; it's a deduction based on what *you* observed! Next, we'll tackle «-더라.» With this one, you can share personal discoveries and witnessed events, like,

Oh, it turns out I saw so-and-so on the street yesterday, and they were...
But be careful, you won't use it for your own planned actions! Later, you'll discover how to express that someone is pretending to do something with «-는/ㄴ/은 척하다.» For instance, "They're pretending to be asleep! or They're pretending to know everything! Finally, -대로" comes in to show you're doing something exactly according to something else. Think,
I did it exactly according to the recipe
or
Do it just as I told you.
After this chapter, you'll be able to confidently talk about your guesses and observations, describe what others are doing, and share stories you've personally witnessed. Your conversations will become much more natural and richer. How cool is that? Let's go!

Learning Objectives

By the end of this chapter, you will be able to:

  1. 1
    By the end you will be able to: Synthesize observations into logical deductions using -나 보다 and -더라.

Chapter Guide

Overview

Welcome to a crucial step in mastering Korean grammar at the B1 CEFR level! This chapter is designed to elevate your conversational skills, allowing you to express nuanced observations and deductions like a native speaker. Moving beyond simple statements, you'll learn how to articulate what you infer from situations and what you've personally witnessed. This isn't just about learning new structures; it's about understanding the subtle ways Koreans convey meaning, making your language much more natural and engaging.
By grasping these expressions, you'll gain the confidence to share your insights, guesses, and personal discoveries with precision. Imagine being able to tell a friend, "It seems like you're really busy these days," or "Turns out, that new cafe has amazing coffee!" These aren't just guesses; they're deductions based on evidence you've observed. This chapter will unlock a new level of expressive power in your intermediate Korean journey, making your conversations richer and more authentic.
We'll dive into how to make precise guesses, share personal discoveries, describe people's pretense, and explain actions done "according to" something. Mastering these Korean grammar patterns is key to sounding less like a textbook and more like a fluent speaker. Get ready to transform your ability to talk about the world around you with greater accuracy and depth!

How This Grammar Works

Let's break down the exciting Korean grammar patterns that will help you express observations and deductions. First up is -나 보다, which you'll use for "Guessing Based on Signs" or "Logical Deductions." This versatile ending attaches to verbs (V + -나 보다), adjectives (A + -ㄴ/은가 보다), and nouns (N + -인가 보다) to express that "it seems like" or "it must be" something, based on visible or audible evidence. For instance, seeing someone yawn might lead you to say, 잠을 못 잤나 봐요. (It seems like they didn't sleep well.) or 비가 오나 봐요. (It seems like it's raining.) if you hear thunder.
Next, we have -더라, meaning "Turns Out / I Found That..." This expression is fantastic for sharing personal discoveries or events you directly witnessed in the past. It's about *your own* experience and realization. For example, if you tried a new restaurant and found it surprisingly good, you could say, 그 식당 음식 정말 맛있더라. (Turns out, the food at that restaurant was really delicious.) Remember, -더라 cannot be used for your own planned actions or future events.
Then comes -는/ㄴ/은 척하다, which means "Pretending to..." This is used when someone is feigning an action or a state. For verbs, you add -는 척하다 (e.g., 자는 척했어요. - I pretended to be asleep.). For adjectives, it's -ㄴ/은 척하다 (e.g., 예쁜 척하지 마세요. - Don't pretend to be pretty.). For nouns, use -인 척하다 (e.g., 학생인 척했어요. - I pretended to be a student.).
Finally, -대로 signifies "As / According to." This pattern is used to express that something is done exactly in the manner of or following a particular standard, instruction, or example. You can attach it to nouns (N + 대로), or to verb stems with -는 대로 (e.g., 내가 말한 대로 해. - Do it just as I told you.). It's perfect for describing adherence to a plan or instruction.

Common Mistakes

  1. 1✗ Wrong: 저는 내일 제주도에 가겠더라.
✓ Correct: 저는 내일 제주도에 갈 거예요. (I will go to Jeju Island tomorrow.)
*Explanation:* -더라 is used to share *past personal discoveries or observations* of others, not your own planned future actions or current feelings.
  1. 1✗ Wrong: 그 사람이 피곤한 것 같아요. (Said when clearly seeing signs of tiredness)
✓ Correct: 그 사람이 피곤한가 봐요. (It seems like that person is tired [based on what I observe].)
*Explanation:* While -는 것 같다 is a general "it seems/I think," -나 보다 is specifically for making deductions based on *observable evidence* (visual, auditory, etc.). Use -나 보다 when you have a clear sign.
  1. 1✗ Wrong: 그는 부자인 척하는 사람이에요. (Trying to say "He's pretending to be rich")
✓ Correct: 그는 부자인 척하는 사람이에요. (He's a person who pretends to be rich.)
*Explanation:* When -척하다 follows a noun, you need to use -인 척하다. For adjectives, it's -ㄴ/은 척하다, and for verbs, -는 척하다. Make sure to apply the correct particle based on the word type.

Real Conversations

A

A

민수 씨가 어제 잠을 못 잤나 봐요. 얼굴이 많이 피곤해 보여요. (It seems like Minsu didn't sleep well yesterday. His face looks very tired.)
B

B

그러게요. 어제 밤늦게까지 일했나 봐요. (I know, right. It seems like he worked until late last night.)
A

A

저번에 갔던 그 카페, 커피가 정말 맛있더라. (Turns out, the coffee at that cafe we went to last time was really delicious.)
B

B

아, 맞아요! 분위기도 좋았더라고요. (Oh, right! The atmosphere was good too, I remember.)
A

A

아이가 숙제하기 싫어서 자는 척하고 있어요. (The child is pretending to be asleep because they don't want to do homework.)
B

B

하하, 귀엽네요. 저도 어릴 때 그랬더라고요. (Haha, how cute. I used to do that when I was little too.)

Quick FAQ

Q

What's the main difference between -나 보다 and -는 것 같다 in B1 Korean grammar?

-나 보다 is used for deductions based on *observable evidence* (what you see or hear), while -는 것 같다 is a more general "it seems/I think" that can be used with or without direct evidence.

Q

Can I use -더라 to talk about my own feelings or current state?

No, -더라 is specifically for sharing *past personal discoveries* or observations about *others* or *things*. You generally wouldn't use it for your own current feelings or planned actions.

Q

Is -는 척하다 always used in a negative context, implying deceit?

While it often implies pretense or deceit, -는 척하다 can sometimes be used playfully or neutrally, depending on the context. For example, ignoring someone playfully might be "못 본 척하다" (to pretend not to see).

Q

How is -대로 different from -처럼 (like/as)?

-대로 means "exactly according to" or "just as," implying strict adherence or following. -처럼 means "like" or "as if," implying similarity or comparison rather than strict adherence.

Cultural Context

These Korean grammar patterns are essential for adding nuance and politeness to your speech, reflecting the indirect communication style often favored in Korea. Using -나 보다 softens your guesses, making them sound like thoughtful observations rather than direct accusations, which is important for maintaining harmony. -더라 is frequently used in informal settings to share personal anecdotes or gossip, making conversations feel more intimate and engaging. -는 척하다 can be used humorously among close friends or critically when discussing someone's insincerity. Mastering these structures will help you navigate social interactions more smoothly and speak natural Korean.

Key Examples (8)

1

불이 켜져 있는 걸 보니 집에 있나 봐요.

Seeing the lights on, I guess they are home.

Guessing Based on Signs: It Seems Like (-나 보다)
2

사람들이 우산을 쓰고 가요. 비가 오나 봐요.

People are carrying umbrellas. I guess it's raining.

Guessing Based on Signs: It Seems Like (-나 보다)
3

밖에 사람들이 우산을 쓰고 있어요. 비가 오나 봐요.

People outside are using umbrellas. It looks like it's raining.

Logical Deductions: It must be... (-나 보다)
4

줄이 진짜 기네. 여기 맛집인가 봐.

The line is really long. This place must be a famous restaurant.

Logical Deductions: It must be... (-나 보다)
5

그 카페 커피가 진짜 맛있더라.

I found the coffee at that cafe to be really delicious.

Turns Out / I Found That... (-더라)
6

어제 영화관에 사람이 정말 많더라고요.

There were so many people at the cinema yesterday.

Turns Out / I Found That... (-더라)
7

My little brother pretended to be asleep, so I quietly left the room.

My little brother pretended to be asleep, so I quietly left the room.

Pretending to... (-는/ㄴ/은 척하다)
8

I can't eat spicy food, but I pretended it was okay.

I can't eat spicy food, but I pretended it was okay.

Pretending to... (-는/ㄴ/은 척하다)

Tips & Tricks (4)

💡

Evidence First

Always ensure you have a reason for your guess.
frontend.learn_grammar.from_rule: Guessing Based on Signs: It Seems Like (-나 보다)
💡

Evidence is Key

Always have a reason for your guess.
frontend.learn_grammar.from_rule: Logical Deductions: It must be... (-나 보다)
💡

Personal witness

Only use it for things you saw.
frontend.learn_grammar.from_rule: Turns Out / I Found That... (-더라)
💡

Spacing matters

Always write 척하다 as one word.
frontend.learn_grammar.from_rule: Pretending to... (-는/ㄴ/은 척하다)

Key Vocabulary (5)

눈이 빨갛다 (nuni ppalgata) eyes are red 졸리다 (jollida) to be sleepy 알다 (alda) to know 레시피 (resipi) recipe 거리 (geori) street

Real-World Preview

coffee

The Cafe Observation

Review Summary

  • V/Adj + -나 보다
  • V/Adj + -나 보다
  • V/Adj + -더라
  • V + -는/ㄴ 척하다 | Adj + -(으)ㄴ 척하다
  • N + 대로 | V + -(으)ㄴ 대로

Common Mistakes

-나 보다 is for others. Use -ㄴ 것 같다 for your own state.

Wrong: 나는 피곤해 보이나 봐요.
Correct: 나는 피곤해 보이나 봐요 (Incorrect usage of subject).

Do not use -더라 for your own planned actions, only for observations.

Wrong: 어제 내가 학교에 가더라.
Correct: 어제 내가 학교에 갔어.

Remember to use the correct tense marker for the pretending action.

Wrong: 먹는 척했다.
Correct: 먹은 척했다 (Past tense).

Next Steps

You've conquered the detective's chapter! Keep observing the world in Korean!

Write a diary entry using -더라 to describe your day.

Continue to: Comparisons, Tendencies, and Wishes

Quick Practice (10)

Choose the best fit.

___ 척하지 마세요.

✓ Correct! ✗ Not quite. Correct answer: 아픈
Adjective modifier.

frontend.learn_grammar.from_rule: Pretending to... (-는/ㄴ/은 척하다)

Choose the correct form.

말한 ___ 하세요.

✓ Correct! ✗ Not quite. Correct answer: 대로
Past verb + 대로.

frontend.learn_grammar.from_rule: As / According to (대로)

Fill in the blank.

어제 영화가 정말 ___.

✓ Correct! ✗ Not quite. Correct answer: 슬프더라
Correct retrospective form.

frontend.learn_grammar.from_rule: Turns Out / I Found That... (-더라)

Choose the correct form.

그녀는 ___ 척해요.

✓ Correct! ✗ Not quite. Correct answer: 예쁜
Adjective modifier.

frontend.learn_grammar.from_rule: Pretending to... (-는/ㄴ/은 척하다)

Fix the error.

Find and fix the mistake:

그는 먹 척해요.

✓ Correct! ✗ Not quite. Correct answer: 먹는 척해요
Needs modifier.

frontend.learn_grammar.from_rule: Pretending to... (-는/ㄴ/은 척하다)

Fill in the blank.

그는 ___ 척했어요.

✓ Correct! ✗ Not quite. Correct answer: 공부하는
Present tense action.

frontend.learn_grammar.from_rule: Pretending to... (-는/ㄴ/은 척하다)

Correct the sentence.

Find and fix the mistake:

예쁘다나 봐요.

✓ Correct! ✗ Not quite. Correct answer: 예쁜가 봐요
Adjective rule.

frontend.learn_grammar.from_rule: Guessing Based on Signs: It Seems Like (-나 보다)

Choose the correct form.

그 사람이 ___ 봐요.

✓ Correct! ✗ Not quite. Correct answer: 바쁜가
Adjective + ㄴ가 보다.

frontend.learn_grammar.from_rule: Guessing Based on Signs: It Seems Like (-나 보다)

Fill in the blank.

계획___ 하세요.

✓ Correct! ✗ Not quite. Correct answer: 대로
Nouns attach directly to 대로.

frontend.learn_grammar.from_rule: As / According to (대로)

Choose the correct tense.

끝나는 ___ 연락할게요.

✓ Correct! ✗ Not quite. Correct answer: 대로
Present tense + 대로.

frontend.learn_grammar.from_rule: As / According to (대로)

Score: /10

Common Questions (6)

Generally no, it's for observing others.
It can be used in both formal and informal settings.
No, it's for external observations.
No, it is only for the past.
Yes, use -인 척하다 (e.g., 왕인 척하다).
It can be, depending on the context.
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Comparisons, Tendencies, and Wishes
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