Trần nhà bị dột.

Trần nhà means ceiling.

It is made of:

• trần = ceiling
• nhà = house, home

Together, trần nhà literally means something like the house’s ceiling, but in natural English we just say the ceiling.

Vietnamese often forms nouns this way, where one word names the thing and another word helps specify it.

Dột means to leak, especially because rainwater is coming through a roof or ceiling.

So in Trần nhà bị dột, the idea is that the ceiling has a leak or is letting water through.

This word is commonly used for leaks caused by rain, such as:

• mái nhà dột = the roof leaks
• trần nhà bị dột = the ceiling is leaking / the ceiling has a leak

Bị often marks that something happens to the subject in a negative, unwanted, or harmful way.

So:

• Trần nhà dột = the ceiling leaks / the ceiling is leaky
• Trần nhà bị dột = the ceiling has become affected by leaking; the ceiling is leaking in an unfortunate way

In this sentence, bị adds the sense that this is a bad problem, not just a neutral description.

Yes, you can.

Both are understandable, but they feel slightly different:

• Trần nhà dột = more direct, matter-of-fact: The ceiling leaks / is leaky
• Trần nhà bị dột = emphasizes that the ceiling is suffering from this problem

In everyday speech, both are possible. Bị makes the situation sound more negative or troublesome.

Not exactly.

Vietnamese bị is often compared to the passive, but it does not work exactly like English passive grammar.

Here, bị does not mean is leaked. Instead, it means the subject is affected by something bad:

• bị hỏng = be broken / get broken
• bị đau = be in pain / suffer pain
• bị dột = be affected by leaking

So it is better to think of bị as marking an unwanted situation, not as a one-to-one equivalent of the English passive.

Vietnamese usually does not use articles like the or a/an the way English does.

So Trần nhà bị dột can mean:

• The ceiling is leaking
• A ceiling is leaking

In real context, it normally means the ceiling because both speaker and listener know which ceiling is being talked about.

Context usually tells you whether something is definite or indefinite.

Vietnamese often does not need a separate verb like is/are in sentences of this kind.

In English, you say:

• The ceiling is leaking

In Vietnamese, you can simply say:

• Trần nhà bị dột

Vietnamese frequently puts the subject first and then the description or event after it, without needing a word equivalent to is.

No. They are related but different.

• trần nhà = ceiling, the inside upper surface of a room
• mái nhà = roof, the outside top covering of a house

This matters because dột often starts with the roof, but you may notice it from the ceiling inside.

So:

• Mái nhà bị dột = the roof leaks
• Trần nhà bị dột = the ceiling is leaking

Yes, but it changes the feel.

• Trần nhà bị dột = neutral, natural statement
• Cái trần nhà bị dột = more specific or emphatic, like that ceiling / the ceiling with extra focus

Cái is a classifier often used with concrete objects, but it is not always needed. In a simple statement like this, leaving it out is very natural.

A rough guide is:

• Trần ≈ chuhn with a low-falling tone
• nhà ≈ nyaa with a falling tone
• bị ≈ bee with a heavy low tone
• dột ≈ zoht or yot depending on dialect, with a short heavy tone

A few important pronunciation notes:

• tr in southern speech may sound closer to ch
• nh sounds like the ny in canyon
• d in northern Vietnamese sounds like z
• d in southern Vietnamese sounds more like y

So the last word may sound different depending on region.

Yes, it is natural and correct.

It sounds like a normal way to describe a household problem. Depending on context, speakers might also say things like:

• Nhà bị dột. = The house leaks.
• Mái nhà bị dột. = The roof is leaking.
• Trần nhà đang bị dột. = The ceiling is leaking right now.

So Trần nhà bị dột is a perfectly normal sentence.

Yes.

• Trần nhà bị dột = The ceiling is leaking / has a leak
• Trần nhà đang bị dột = The ceiling is leaking right now

Đang emphasizes that the action or situation is in progress at the moment.

Without đang, the sentence can still describe a current problem, but it is a bit more general.

The subject is Trần nhà.

That is the thing being talked about. After that comes the comment about it:

• Trần nhà = subject
• bị dột = what is happening to it / its condition

So the basic structure is:

• Subject + situation
• Trần nhà + bị dột

This is a very common Vietnamese sentence pattern.