không vs chưa — Two Types of Negation

Quick Answer

[không means not — a simple, direct negation that carries no implication about the future. [chưa means not yet — it negates an action while strongly implying that the action is expected, possible, or may still happen. When you choose between these two words, you are not just saying "no" — you are telling your listener how permanent that "no" is.

Use không for general facts, preferences, habits, and complete rejections. Use chưa when something has not happened yet but is anticipated, in progress, or still possible.

Comparison Table

Detailed Explanation

When to Use không

Use không when you want to negate a statement in a permanent, general, or neutral way — with no implication that things will change. This is the default negation word in Vietnamese, equivalent to not in English.

Common situations for không:

• Personal preferences and habits: things you never do or do not like. If you are vegetarian, Tôi không ăn thịt (I don't eat meat) is correct — you are not saying "not yet," you simply don't eat it.
• General facts about people or things: Anh ấy không nói tiếng Anh (He doesn't speak English).
• Immediate denials: When someone asks if you did something and you simply did not and do not intend to: Tôi không làm điều đó (I didn't do that).
• Describing states and qualities: Trời không nóng (The weather is not hot). Căn phòng này không sạch (This room is not clean).
• Expressing inability or lack: Tôi không có tiền (I don't have money).

Sentence structure: Subject + không + Verb/Adjective + (Object)

When to Use chưa

Use chưa when an action or state has not occurred up to the present moment, but there is an expectation — either implicit or explicit — that it will or might happen. Chưa always carries a sense of incompleteness or anticipation.

Common situations for chưa:

• Actions that are overdue or pending: Tôi chưa ăn sáng (I haven't had breakfast yet) — breakfast is expected, and it hasn't happened yet.
• Life experiences you haven't had yet: Tôi chưa đến Việt Nam (I haven't been to Vietnam yet) — with the implication that you would like to go.
• Tasks in progress or incomplete: Tôi chưa làm xong bài tập (I haven't finished the assignment yet).
• Processes not yet complete: Anh ấy chưa hiểu (He doesn't understand yet — but he is trying and may soon).

Sentence structure: Subject + chưa + Verb + (Object)

The Question-Answer System

One of the most important practical differences between không and chưa is that each belongs to a different question-answer pair. Using the wrong answer word is one of the most frequent beginner errors.

For không, the matching question is có ... không? placed around the verb:

• Q: Bạn có ăn phở không? — Do you eat phở?
• A (yes): Có, tôi có ăn phở. — Yes, I eat phở.
• A (no): Không, tôi không ăn phở. — No, I don't eat phở.

For chưa, the matching question adds chưa at the very end of the sentence:

• Q: Bạn ăn phở chưa? — Have you eaten phở yet?
• A (yes): Rồi, tôi ăn rồi. — Already, I've already eaten.
• A (no): Chưa, tôi chưa ăn. — Not yet, I haven't eaten yet.

Note for Chinese, Japanese, and Korean Learners

The word không shares a connection with the Chinese character 空 (kōng in Mandarin, kū/から in Japanese), which means emptiness or void. While không in modern Vietnamese functions purely as a negation particle, the underlying concept of absence links it to this character family. This is a useful memory anchor for learners who already know Chinese or Japanese.

Chưa is a native Vietnamese word with no Hán-Việt (Sino-Vietnamese) equivalent. It expresses temporal incompleteness — a concept very similar to Japanese まだ (mada, not yet) and Korean 아직 (ajik, not yet). If you speak Japanese or Korean, those words are a reliable mental anchor: whenever you would say まだ or 아직, Vietnamese will almost always use chưa.

Northern vs. Southern Vietnamese

Both không and chưa are used identically throughout Vietnam. However, in Southern Vietnamese — especially informal speech in Hồ Chí Minh City — speakers may sometimes use the có ... không? question pattern in contexts where Northern speakers would more naturally use the ... chưa? form. The meaning and grammar of không and chưa themselves do not change between regions.

Example Pairs

Each pair shows the same context using không versus chưa — notice how the meaning shifts between permanent and temporary negation:

Common Patterns

Pattern 1 — có ... không? (Yes/No question — pairs with không)

This is the standard yes/no question structure in Vietnamese. Place có before the verb and không at the end. It frames a neutral question with no implied expectation about the answer.

Pattern 2 — ... chưa? (Have you done it yet? — pairs with chưa)

Add chưa at the end of the sentence to ask whether something has been completed yet. This question implies the speaker expects the action to have happened or to be in progress.

Pattern 3 — vẫn chưa (still haven't — use with chưa)

Adding vẫn (still) before chưa emphasizes that something has not happened despite time passing. This is equivalent to "still haven't" in English and often conveys mild frustration or surprise.

Pattern 4 — chưa bao giờ vs. không bao giờ (two types of "never")

Both patterns mean "never," but they are not interchangeable. Chưa bao giờ means something has never happened up to now but could in the future. Không bao giờ is a stronger, more absolute statement — the speaker has no intention of doing something or is making a firm declaration.

Pattern 5 — không ... nữa (not anymore — use with không)

Adding nữa (anymore / more) after the verb phrase creates the meaning of "no longer" or "not anymore." This pattern always uses không, never chưa.

Common Mistakes

Mistake 1 — Using không when the context implies "not yet"

When you mean to say something has not happened yet but is expected, you must use chưa. Using không instead communicates a permanent refusal or a general habit, which can sound unnatural or even rude depending on context.

❌ Tôi không ăn tối. Bây giờ tôi đang đói.

✅ Tôi chưa ăn tối. Bây giờ tôi đang đói.

Saying "I'm hungry right now" implies dinner is an expected event that simply hasn't happened yet — a temporary situation. Using không ăn tối would mean you never eat dinner as a general habit, which contradicts the fact that you are currently hungry from skipping it.

Mistake 2 — Answering a chưa question with không

When someone asks ... chưa? (have you done it yet?), they expect either Rồi (yes, already done) or Chưa (not yet) as an answer. Responding with Không does not fit this question type and sounds unnatural to native speakers.

❌ Bạn ăn chưa? — Không.

✅ Bạn ăn chưa? — Chưa. / Rồi.

The question Bạn ăn chưa? uses the chưa question pattern, so the natural answers are Chưa (not yet) or Rồi (already). Không is the answer for có ... không? questions — keep these two systems separate.

Mistake 3 — Using chưa for permanent preferences

Chưa always implies that something might change. Using it for a permanent preference or a stable personal fact creates an unintended meaning — it suggests your preference is temporary or that you are "not yet" at a stage you will eventually reach, which can confuse or amuse native speakers.

❌ Tôi chưa thích ăn cay. (Said as a permanent preference)

✅ Tôi không thích ăn cay.

Chưa thích implies "I don't like spicy food yet — but I might come to like it eventually." If you simply dislike spicy food as a stable preference with no plans to change, không thích is the correct choice.

Mistake 4 — Confusing chưa bao giờ and không bao giờ

Both mean "never," but they carry very different weight. Using không bao giờ for a simple lack of experience sounds like a sworn refusal. Learners often swap these two patterns when they just mean to say they have not done something yet.

❌ Tôi không bao giờ đến Đà Lạt. (You just haven't visited — it's not a refusal)

✅ Tôi chưa bao giờ đến Đà Lạt.

Chưa bao giờ means "up to this point, it has never happened" — and it remains open to change. Không bao giờ is a strong declaration: "I refuse / I will never do this." When talking about travel, experiences, or food you simply haven't tried, always prefer chưa bao giờ.

Mistake 5 — Placing không or chưa in the wrong position

Both không and chưa must come directly before the verb they negate. Placing them before the object, at the end of the sentence, or after the verb produces incorrect Vietnamese.

❌ Tôi ăn không cơm.

✅ Tôi không ăn cơm.

The negation word always precedes the verb, not the object. The fixed structure is: Subject + không / chưa + Verb + Object. There are no exceptions to this word order for basic negation.

Related Grammar Points

• là vs Zero Copula — When to Use 'là' (Comparison A1)
• bao nhiêu vs mấy — How Many (Large vs Small) (Comparison A1)
• đã vs rồi — Past Tense vs Completion (Comparison A1)
• có...không vs ...chưa — State vs Completion Questions (Comparison A1)
• cái vs con — Object vs Animal Classifiers (Comparison A1)
• gì vs nào — What vs Which (Comparison A1)

Quick Quiz

Fill in the blank with không or chưa:

1. Tôi _____ ăn sáng. Bây giờ tôi rất đói. (I _____ eat breakfast. I am very hungry right now.)

Hint: The speaker is hungry right now because of a missed meal — this is a temporary situation today, not a permanent habit.

2. Anh ấy _____ uống rượu. Anh ấy không bao giờ chạm vào rượu. (He _____ drink alcohol. He never touches alcohol.)

Hint: The second sentence tells you this is a permanent, lifelong decision — not something that will change.

3. Chúng tôi _____ đến Hội An. Năm sau chúng tôi sẽ đi thăm. (We _____ been to Hội An. Next year we will visit.)

Hint: The second sentence reveals a future plan — the visit hasn't happened yet but is already being anticipated.