Suggestion -(으)ㄹ까요 in Korean

In Brief

Attach -(으)ㄹ까요? to a verb when you want to ask for the listener's opinion: 같이 갈까요? means “Shall we go together?” and 창문 열까요? means “Shall I open the window?” With an event rather than a proposed action, it expresses uncertainty: 내일 비가 올까요? means “Do you think it will rain tomorrow?” Use -ㄹ까요 after a vowel and -을까요 after most consonants.

Overview

-(으)ㄹ까요? is a polite Korean question ending used to consult another person. In everyday conversation, it often corresponds to English “Shall we...?”, “Shall I...?”, or “What should we...?” It lets you propose an action without simply telling the other person what to do. This makes it useful for arranging meals, choosing places, offering help, and making plans together.

The same ending also asks what someone thinks is likely: “Will it...?”, “Do you think...?”, or “I wonder whether...?” Korean does not change the form; the subject and the situation tell you which meaning is intended. 제가 할까요? proposes that I do something, while 민수 씨가 할까요? usually asks whether Minsu will do it.

This is an A2 pattern. The beginner task is simple: learn the attachment rule and use it for suggestions, offers, and uncertain predictions. Later sections explain tone, irregular stems, and related forms, but you do not need all of those details before you begin speaking.

How It Works

Basic formation

Start with the verb stem (the dictionary form without -다) and add the appropriate ending.

Stem ending	Add	Dictionary form	Result
Vowel	-ㄹ까요?	가다 → 가-	갈까요?
Most consonants	-을까요?	먹다 → 먹-	먹을까요?
ㄹ	-까요? after the existing ㄹ	열다 → 열-	열까요?

For a vowel-final stem, ㄹ becomes the final consonant of the last syllable: 가 + ㄹ까요 → 갈까요. For a consonant-final stem, add the full syllable 을: 먹 + 을까요 → 먹을까요. If the stem already ends in ㄹ, do not add another ㄹ or 을: 살다 → 살까요?, not 살을까요?

Common forms include:

Dictionary form	Meaning	-(으)ㄹ까요 form
하다	to do	할까요?
보다	to see/watch	볼까요?
마시다	to drink	마실까요?
읽다	to read	읽을까요?
찾다	to find/look for	찾을까요?
만들다	to make	만들까요?

The ending already makes the sentence a question, so it is normally written with a question mark and spoken with questioning intonation.

Three core meanings

1. Suggesting a shared action: “Shall we...?”

When the speaker and listener can do the action together, the understood subject is often “we.” Korean usually leaves that subject unstated.

• 같이 갈까요? — Shall we go together?
• 여기서 기다릴까요? — Shall we wait here?
• 먼저 커피를 마실까요? — Shall we have coffee first?

Words such as 같이 (“together”), 우리 (“we/our”), and the surrounding conversation can make the shared meaning explicit.

2. Offering to act: “Shall I...?”

If the action is something the speaker can do for the listener, the same form becomes an offer. 제가 (“I,” with a polite/humble nuance) is often added when the actor needs to be clear.

• 창문 열까요? — Shall I open the window?
• 제가 사진을 찍을까요? — Shall I take the photo?
• 제가 도와드릴까요? — Shall I help you?

English forces you to choose between “Shall I?” and “Shall we?” Korean often does not. Context supplies the missing subject. Add 제가 or 같이 if ambiguity matters.

3. Asking about an uncertain event: “Do you think...?”

When the subject is a third person, the weather, a result, or another event outside the participants' direct control, -(으)ㄹ까요? asks for an opinion or prediction.

• 내일 비가 올까요? — Do you think it will rain tomorrow?
• 그 사람이 올까요? — Do you think that person will come?
• 시험이 어려울까요? — Do you think the exam will be difficult?

Adjectives in Korean behave much like verbs in their endings, so descriptive words can take this pattern too: 비싸다 → 비쌀까요? (“Do you think it will be expensive?”).

Question words

A question word turns the pattern into an invitation to choose together or speculate about an answer.

• 뭐 먹을까요? — What shall we eat?
• 어디에서 만날까요? — Where shall we meet?
• 몇 시에 출발할까요? — What time shall we leave?
• 누가 먼저 도착할까요? — Who do you think will arrive first?

Notice that 뭐 먹을까요? is not merely asking what the listener plans to eat. In a shared situation, it normally opens a joint decision.

Past speculation

For a past event whose answer is uncertain, Korean commonly uses -았/었을까요?:

• 왜 늦었을까요? — Why do you think they were late? / I wonder why they were late.
• 민수 씨가 벌써 도착했을까요? — Do you think Minsu has already arrived?

This is an extension of the basic pattern: the past marker -았/었- comes before -을까요. It does not propose a past action; it wonders about what happened.

Examples in Context

Korean	English	Note
같이 갈까요?	Shall we go together?	Shared suggestion
뭐 먹을까요?	What shall we eat?	Asking for a joint choice
점심은 어디에서 먹을까요?	Where shall we eat lunch?	Planning together
잠깐 쉴까요?	Shall we take a short break?	Vowel-final stem 쉬-
버스로 갈까요, 지하철로 갈까요?	Shall we go by bus or by subway?	Offering alternatives
창문 열까요?	Shall I open the window?	An offer understood from context
제가 가방을 들까요?	Shall I carry the bag?	제가 identifies the speaker
제가 다시 설명해 드릴까요?	Shall I explain it again for you?	Polite offer with -아/어 드리다
내일 비가 올까요?	Do you think it will rain tomorrow?	Uncertain prediction
이 옷이 저한테 맞을까요?	Do you think these clothes will fit me?	Asking for an opinion
주말에 사람이 많을까요?	Do you think it will be crowded on the weekend?	Descriptive verb
누가 먼저 도착할까요?	Who do you think will arrive first?	Speculation, not a suggestion
오늘은 집에서 쉬는 게 어떨까요?	How about resting at home today?	Softer alternative pattern
너무 늦었는데 택시를 탈까요?	It is quite late; shall we take a taxi?	Reason followed by a proposal
회의가 왜 취소됐을까요?	Why do you think the meeting was canceled?	Wondering about the past

Common Mistakes

Adding -을까요 after every consonant

• Wrong: 살을까요?
• Right: 살까요?
• Why: The stem 살- already ends in ㄹ. Keep that ㄹ and add -까요. The same applies to 열다 → 열까요? and 만들다 → 만들까요?

Confusing a proposal with a statement of intention

• Wrong for “Shall we go tomorrow?”: 내일 갈 거예요.
• Right: 내일 갈까요?
• Why: 갈 거예요 states a future plan or prediction: “I/we will go” or “I am going to go.” 갈까요? asks the listener to consider the idea. The question mark alone does not make the two patterns interchangeable.

Assuming the form always means “we”

• Potentially unclear: 할까요?
• Clear offer: 제가 할까요?
• Clear shared proposal: 같이 할까요?
• Why: Korean often omits the subject. English translation requires “I” or “we,” but the Korean form itself does not specify either one. State 제가 or 같이/우리 when context is insufficient.

Using a suggestion when you only want factual information

• Misleading in a shared meal situation: 뭐 먹을까요?
• For “What are you going to eat?”: 뭐 먹을 거예요?
• Why: 뭐 먹을까요? usually asks what “we” should eat. 뭐 먹을 거예요? asks about someone’s plan. English “What will you eat?” can hide this difference.

Forming an unclear negative suggestion

• Less clear: 안 갈까요?
• Clear “Shall we not go?”: 가지 말까요?
• Why: 안 갈까요? can be understood through context, but a negative question may also carry an expectation such as “Won't they go?” Use -지 말까요? when you explicitly propose not doing the action.

Treating -(으)ㄹ까요? as casual speech

• Awkward to a close friend if the rest is casual: 우리 이제 갈까요?
• Natural casual form: 우리 이제 갈까?
• Why: -요 makes the ending polite. Keep it with polite conversation, and remove 요 for a consistently intimate/casual style. The polite version is not wrong with friends, but mixing speech levels can sound inconsistent.

Usage Notes

Politeness and response style

-(으)ㄹ까요? belongs to the common polite 해요체 speech level. It works well with strangers, coworkers, and people you do not address casually. It is polite, but the action itself still needs to be socially appropriate. Suggesting 앉을까요? to a customer may be less natural than respectfully inviting them with 앉으세요 (“Please sit”).

Natural replies depend on whether you accept, reject, or offer another option:

• 네, 좋아요. — Yes, sounds good.
• 그래요. — Okay / Let's do that.
• 좋아요. 그렇게 해요. — Good. Let's do that.
• 아니요, 조금 이따가 해요. — No, let's do it a little later.
• 다른 걸 먹을까요? — Shall we eat something else?

A bare 네 is possible, but a short comment often sounds warmer and makes the decision clearer.

Intonation and context

With a genuine suggestion, the speaker leaves the decision open. With speculative questions, intonation and context may convey curiosity, concern, or doubt. 괜찮을까요? can mean “Do you think it will be okay?”, “Would that be okay?”, or a cautious request for approval. The grammar does not encode one fixed English phrase.

Suggestions are not commands

Compare these common choices:

Form	Main effect	Example	Natural English sense
-(으)ㄹ까요?	Consults the listener	같이 갈까요?	Shall we go together?
-(으)ㅂ시다	Formally proposes joint action	같이 갑시다.	Let's go together.
-자	Casual proposal	같이 가자.	Let's go together.
-(으)세요	Polite request, instruction, or invitation	같이 가세요.	Please go together / Come along.

Because -(으)ㄹ까요? is a question, it generally sounds more open and collaborative than a direct “let's” form.

Beyond the Basics / Advanced Use

You do not need to master this section at A2, but these forms are frequent and help explain sentences that do not translate neatly as “shall.”

Stem changes and irregular verbs

The ending begins with a vowel in the -을까요 form, so familiar Korean stem changes can appear:

Dictionary form	Result	Meaning
듣다	들을까요?	Shall we listen? / Do you think [someone] will listen?
걷다	걸을까요?	Shall we walk?
돕다	도울까요?	Shall I help?
짓다	지을까요?	Shall we build/name?
모르다	모를까요?	Do you think [someone] does not know?

These are not special exceptions created by -(으)ㄹ까요; they follow the same stem-change patterns seen before other vowel-initial endings.

A more considerate offer: -아/어 드릴까요?

When offering a service to someone, Korean often combines the action with 드리다, the humble form of “give” used for doing something for another person:

• 문을 열어 드릴까요? — Shall I open the door for you?
• 예약을 확인해 드릴까요? — Shall I check the reservation for you?

This can sound more service-oriented and considerate than the plain verb. Do not use 드리다 merely because the sentence is polite; it implies that the action benefits or is done for the other person.

Softer opinions with -(으)면 어떨까요? and -는 게 어떨까요?

For advice or a carefully phrased proposal, Korean often asks “How would it be if...?”:

• 조금 일찍 출발하면 어떨까요? — How about leaving a little early?
• 다음 주에 다시 이야기하는 게 어떨까요? — How about discussing it again next week?

These forms are useful when you want to present an option rather than move directly toward a joint decision. In sensitive discussions, that extra distance may sound gentler.

Self-directed wondering

A speaker can use the casual -(으)ㄹ까? while thinking aloud:

• 뭘 입을까? — What should I wear? / I wonder what to wear.
• 지금 전화할까? — Should I call now?

With 요, the thought is directed politely toward a listener: 뭘 입을까요? may invite that person to help choose. In writing and inner monologue, -(으)ㄹ까 can also mark open speculation without requesting an actual answer.

Rhetorical and cautious questions

In formal discussion, questions such as 이 방법이 정말 효과가 있을까요? (“Can this method really be effective?”) may introduce doubt rather than seek a yes-or-no reply. Likewise, 가능할까요? often functions as a cautious “Would it be possible?” The core remains the same: the speaker avoids presenting the proposition as settled and leaves room for evaluation.

Practice Tips

1. Make three versions from one verb. With 가다, say 같이 갈까요? (shared suggestion), 제가 갈까요? (offer), and 민수 씨가 갈까요? (prediction). This trains you to use context and subjects rather than translating one fixed English phrase.
2. Plan a real outing aloud. Ask five questions such as 어디에서 만날까요?, 몇 시에 갈까요?, and 뭐 먹을까요? Then answer each one naturally. Question words make the pattern immediately useful.
3. Sort stems before speaking. Practice a small set in three groups: vowel stems (보다 → 볼까요?), consonant stems (먹다 → 먹을까요?), and ㄹ stems (만들다 → 만들까요?). Add irregular verbs only after the basic choice feels automatic.

Related Concepts

• Prerequisite: Future/Intention -(으)ㄹ 거예요 — uses the same future-oriented -(으)ㄹ shape but states plans or predictions instead of consulting the listener.