A1 Expression 중립

Tôi không biết

I don't know

Used when one lacks information.

🌍

문화적 배경

People in the North tend to use 'ạ' more strictly at the end of sentences to show politeness, especially with 'Tôi không biết ạ'. In the South, 'không' is often pronounced and sometimes written as 'hổng' in casual speech, making it 'Tui hổng biết'. Directly saying 'I don't know' can sometimes be seen as a lack of initiative. It's often better to say 'I will check and get back to you'. Young people use 'Bó tay' (tied hands) or 'Chịu' much more frequently than the standard phrase when talking to peers.

💡

Add 'ạ' for respect

Always add 'ạ' at the end when speaking to someone older to avoid sounding rude.

⚠️

Watch your pronouns

Using 'Tôi' with a teacher or boss can sound too distant. Use 'Em' instead.

Used when one lacks information.

💡

Add 'ạ' for respect

Always add 'ạ' at the end when speaking to someone older to avoid sounding rude.

⚠️

Watch your pronouns

Using 'Tôi' with a teacher or boss can sound too distant. Use 'Em' instead.

🎯

The 'Nữa' trick

Add 'nữa' at the end ('Tôi không biết nữa') to sound more natural and less like a robot.

💬

Body Language

A slight tilt of the head or a small shrug often accompanies this phrase in Vietnam.

셀프 테스트

Fill in the blank with the correct negator to say 'I don't know'.

Tôi ___ biết.

✓ 정답! ✗ 아쉬워요. 정답: không

'Không' is the standard negator for 'not'.

Which sentence means 'I don't know how to swim'?

Choose the correct translation:

✓ 정답! ✗ 아쉬워요. 정답: a

'Biết' is used for skills like swimming.

Complete the dialogue with a polite response.

A: Anh có biết khách sạn Rex ở đâu không? B: Xin lỗi, ___.

✓ 정답! ✗ 아쉬워요. 정답: a

'Tôi không biết ạ' is the most polite and correct way to say you don't know a location.

Match the phrase to the situation.

You are talking to your teacher and you don't know the answer.

✓ 정답! ✗ 아쉬워요. 정답: a

'Em' and 'ạ' are necessary for a respectful student-teacher relationship.

🎉 점수: /4

시각 학습 자료

연습 문제 은행

4 연습 문제
Fill in the blank with the correct negator to say 'I don't know'. Fill Blank A1

Tôi ___ biết.

✓ 정답! ✗ 아쉬워요. 정답: không

'Không' is the standard negator for 'not'.

Which sentence means 'I don't know how to swim'? Choose A1

Choose the correct translation:

✓ 정답! ✗ 아쉬워요. 정답: a

'Biết' is used for skills like swimming.

Complete the dialogue with a polite response. dialogue_completion A2

A: Anh có biết khách sạn Rex ở đâu không? B: Xin lỗi, ___.

✓ 정답! ✗ 아쉬워요. 정답: a

'Tôi không biết ạ' is the most polite and correct way to say you don't know a location.

Match the phrase to the situation. situation_matching A2

You are talking to your teacher and you don't know the answer.

✓ 정답! ✗ 아쉬워요. 정답: a

'Em' and 'ạ' are necessary for a respectful student-teacher relationship.

🎉 점수: /4

자주 묻는 질문

14 질문

No, it's neutral. However, using the wrong pronoun or a harsh tone can make it sound blunt. Adding 'ạ' or 'nữa' helps.

Yes, in very casual settings with friends. In formal settings, it's too short and sounds dismissive.

'Biết' is for facts and skills. 'Hiểu' is for understanding meanings, reasons, or concepts.

Use 'Tôi không biết anh ấy'. Don't forget the 'ấy'!

Yes, 'Hổng biết' (Southern) or 'Biết chết liền' (I'd die if I knew).

Yes! 'Tôi không biết nấu ăn' means 'I don't know how to cook'.

Vietnamese uses kinship terms as pronouns. 'Em' is used if you are younger than the person you are talking to.

It's an informal way to say 'I'm stumped' or 'I give up on trying to know'.

Use 'Tôi chưa biết'.

Yes, 'không' is the most common way to negate any verb in Vietnamese.

Say 'Tôi không chắc' (I'm not sure).

Yes, it has the 'Sắc' tone (high-rising). Your voice should go up.

Yes, but follow it with 'but I will find out' to show a good attitude.

The meaning is the same, but the pronunciation of 'không' and 'biết' varies slightly.

관련 표현

🔗

Tôi không chắc

similar

I'm not sure

🔗

Tôi không hiểu

similar

I don't understand

🔗

Ai mà biết được

specialized form

Who knows?

🔄

Tôi chịu

synonym

I give up / I'm stumped

🔗

Tôi biết rồi

contrast

I already know

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