có...không vs ...chưa — State vs Completion Questions

Quick Answer

Use [có...không to ask whether something is true, happening, or exists — a general yes/no question. Use ...chưa to ask whether something has happened yet — implying you expect it to happen eventually. The answers are also different: có / không for the first pattern, and rồi / chưa for the second.

Comparison Table

Detailed Explanation

có...không — Asking About States

The pattern có...không wraps the verb or adjective between two question words. It is a neutral yes/no question that does not assume anything about whether the action happened or will happen. You use it to ask about facts, habits, preferences, or current states.

Structure: Subject + có + Verb/Adjective + không?

This pattern is very close to the Chinese 有没有 (yǒu méiyǒu) or the Korean -아/어요? neutral question form. Japanese learners can think of it like 〜ますか without any implication of "yet."

Examples of when to use có...không:

• Asking about preferences: Bạn có thích cà phê không? (Do you like coffee?)
• Asking about a current state: Chị có bận không? (Are you busy?)
• Asking about general facts: Anh có biết tiếng Nhật không? (Do you know Japanese?)

...chưa — Asking About Completion

The word [chưa placed at the end of a sentence turns it into a question meaning "have you done X yet?" It carries an implicit assumption: the action is expected to happen, and you are checking whether it has occurred. This is similar to the Chinese 了...没有 (le...méiyǒu) completion question or the Korean 아직...했어요? pattern.

Structure: Subject + Verb + chưa?

The key nuance is expectation. When a Vietnamese person asks Ăn cơm chưa?, they assume you need to eat and are checking in. If someone has no reason to expect you to have done something, they would use có...không instead.

Examples of when to use ...chưa:

• Asking about a meal (expected daily action): Anh ăn cơm chưa? (Have you eaten yet?)
• Checking on progress: Em làm bài tập chưa? (Have you done your homework yet?)
• Relationship status (culturally common): Chị lấy chồng chưa? (Have you gotten married yet?)

Northern vs. Southern Differences

In Southern Vietnamese, speakers often drop [có in the có...không pattern and simply say: Anh ăn cơm không? instead of Anh có ăn cơm không? Both are understood nationwide, but the full form with có is more common in formal speech and Northern Vietnamese.

The chưa pattern is used consistently across all regions.

Example Pairs

Each pair shows the same situation asked two different ways — notice how the meaning subtly shifts.

Common Patterns

Some contexts strongly favor one pattern over the other. Here are fixed patterns where choosing the wrong one sounds unnatural or changes the meaning significantly.

Common Mistakes

Mistake 1 — Using chưa with adjectives

The chưa pattern works only with action verbs, not with adjectives or stative descriptions. When asking about a state or quality, always use có...không.

❌ Anh khỏe chưa?

✅ Anh có khỏe không?

While Anh khỏe chưa? sounds like it might mean "Are you better yet?" (after illness), it is awkward phrasing. The natural form uses có...không. If someone is recovering, a native speaker would more naturally say Anh khỏe hơn chưa? (Are you feeling better yet?) — adding the comparative hơn to make it an action of improvement.

Mistake 2 — Answering a chưa question with có/không

Learners often mix up the answer words. A có...không question is answered with có or không. A chưa question is answered with rồi (already done) or chưa (not yet).

❌ Q: Anh ăn cơm chưa? — A: Có.

✅ Q: Anh ăn cơm chưa? — A: Rồi. / Chưa.

Answering with Có to a chưa question confuses Vietnamese speakers because Có means "yes I have the action" (general), not "yes I have completed it." Always use [rồi to confirm completion and Chưa to say "not yet."

Mistake 3 — Omitting có in the middle of the pattern

In the có...không structure, the word có must appear before the verb. Beginners sometimes forget it, turning a question into a statement.

❌ Anh học tiếng Việt không?

✅ Anh có học tiếng Việt không?

Note: In Southern Vietnamese, dropping có is acceptable in casual speech. But in formal speech, writing, or Standard Vietnamese (Northern), always include có. For learners, using the full form is always safe.

Mistake 4 — Using chưa when there is no expectation

The chưa question implies the action is expected. Using it in situations where there is no such expectation sounds pushy or odd.

❌ Bạn học tiếng Swahili chưa? (to a random stranger)

✅ Bạn có học tiếng Swahili không?

Unless you have a reason to expect the person to learn Swahili, using chưa here sounds strange. Use có...không for genuinely neutral questions with no expectation of completion.

Mistake 5 — Forgetting that rồi can also end statements

Learners sometimes confuse the question word chưa with the answer word rồi. Remember: chưa at the end of a sentence makes a question; rồi at the end of a sentence confirms that an action is complete.

❌ Tôi ăn cơm chưa. (trying to say "I have eaten")

✅ Tôi ăn cơm rồi. (I have already eaten.)

A sentence ending in chưa with falling intonation can sound like a question or a negative statement ("I haven't eaten yet"). To express completion, use rồi.

Related Grammar Points

• không vs chưa — Two Types of Negation (Comparison A1)
• đã vs rồi — Past Tense vs Completion (Comparison A1)
• bao nhiêu vs mấy — How Many (Large vs Small) (Comparison A1)
• là vs Zero Copula — When to Use 'là' (Comparison A1)
• ở vs tại — Informal vs Formal Location (Comparison A1)
• cái vs con — Object vs Animal Classifiers (Comparison A1)

Quick Quiz

Fill in the blank with có...không or chưa:

1. Anh _____ uống cà phê _____? (You are asking a friend if they drink coffee in general.)

Hint: This is a question about a habit or preference, not about whether something happened yet.

2. Em làm bài tập _____? (A parent asking a child if they have done their homework yet.)

Hint: The parent expects the child to do homework — they are checking if it is done.

3. Bạn _____ mệt _____? (You are asking a friend how they feel after a long trip.)

Hint: Mệt (tired) is an adjective describing a state, not an action.