Tôi nghe bằng tai.

A word-by-word breakdown is:

• Tôi = I
• nghe = hear / listen
• bằng = with / by means of / using
• tai = ear / ears

So the structure is basically:

• Tôi
  • nghe
    • bằng tai
• I
  • hear
    • using ears

In very natural English, this is I hear with my ears.

Vietnamese often leaves out possessive words like my, your, or his/her when the meaning is obvious from context, especially with body parts.

So:

• tai literally means ear / ears
• but in this sentence, it naturally means my ears, because the subject is Tôi (I)

This is very normal in Vietnamese. English usually requires my ears, but Vietnamese often does not.

It can function as either ear or ears, depending on context.

In Tôi nghe bằng tai, it is understood as ears in English, because people normally hear with both ears. Vietnamese does not always mark singular vs. plural as explicitly as English does.

So even though the word is just tai, the natural translation is:

• I hear with my ears

not usually:

• I hear with my ear

Here, bằng means by means of, with, or using. It introduces the instrument or means used to do something.

So in this sentence:

• nghe bằng tai = hear using ears

This use of bằng is common:

• viết bằng bút = write with a pen
• ăn bằng đũa = eat with chopsticks
• đi bằng xe buýt = go by bus

So bằng is showing the means or tool.

It is grammatically correct, but it is a bit more explicit than people usually need in everyday conversation.

Normally, people would just say:

• Tôi nghe. = I hear / I’m listening.

Adding bằng tai sounds a little emphatic or contrastive, as if you are stressing the body part or the method:

• Tôi nghe bằng tai, không phải bằng mắt.
  I hear with my ears, not with my eyes.

So the full sentence is natural in the right context, but it is not something people would say all the time unless they want emphasis.

Because bằng is the better choice for expressing the means or instrument used to do something.

• bằng = by, using, by means of
• với often means with in the sense of together with or toward

So:

• nghe bằng tai = hear using ears

Using với tai here would sound unnatural.

A useful shortcut is:

• If English with means using a tool/method, Vietnamese often uses bằng
• If English with means together with someone, Vietnamese often uses với

This is a very common learner question.

• nghe can mean hear or listen, depending on context
• nghe thấy more clearly means hear / be able to hear

Examples:

• Tôi nghe nhạc. = I listen to music.
• Tôi nghe tiếng mưa. = I hear the sound of rain.
• Tôi nghe thấy tiếng mưa. = I can hear the sound of rain.

In Tôi nghe bằng tai, nghe is enough and sounds fine.
If you said Tôi nghe thấy bằng tai, it would sound odd because bằng tai is already stating the means, and nghe thấy is usually used in other kinds of contexts.

Yes. Vietnamese often uses nghe for both ideas, and context tells you which meaning is intended.

For example:

• Tôi nghe nhạc. = I listen to music
• Tôi nghe tiếng chim. = I hear birds
• Nghe tôi nói đây. = Listen to me

So in this sentence, because of bằng tai, the idea is more like hear with my ears.

Vietnamese word order is often:

• subject + verb + method/instrument

So:

• Tôi = subject
• nghe = verb
• bằng tai = means/instrument phrase

That is why bằng tai comes after the verb.

This is similar to:

• Tôi viết bằng bút. = I write with a pen.
• Tôi ăn bằng đũa. = I eat with chopsticks.

Yes, and in many situations that would be the more natural thing to say.

• Tôi nghe. = I hear / I’m listening

You add bằng tai only if you want to emphasize the body part or explain the method. Without that special emphasis, Tôi nghe is usually enough.

nghe can be tricky for English speakers because of the initial ngh.

A rough guide:

• ngh sounds like the ng in sing
• then add a short eh vowel

So it is approximately like:

• ng-eh

The word has no tone mark, so it has the level tone.

The full sentence is roughly:

• Tôi — level tone
• nghe — level tone
• bằng — falling tone
• tai — level tone

If pronunciation is your goal, the hardest part is usually getting nghe to start with the ng sound instead of an English n or g.

Yes, it can, depending on context.

Because it states something very obvious—people normally hear with their ears—it may sound:

• overly literal
• childlike
• emphatic
• or humorous

It works best when there is a reason to mention the ears specifically, such as contrast, teaching, or explanation.

For example:

• Con người nghe bằng tai. = Humans hear with their ears.
• Tôi nghe bằng tai, còn tôi nhìn bằng mắt. = I hear with my ears, and I see with my eyes.

So the sentence is correct, but context matters a lot.