Hồ bơi ở trong khách sạn.

A simple breakdown is:

• hồ bơi = swimming pool
• ở = is located at / in
• trong = inside / in
• khách sạn = hotel

So the structure is basically:

[thing] + [location marker] + [place]

Here, hồ bơi is the thing being talked about, and ở trong khách sạn tells you where it is.

In Vietnamese, you usually do not use là for location sentences like this. Instead, ở is commonly used to express where something or someone is.

So:

• Hồ bơi ở trong khách sạn = The swimming pool is in the hotel.

Using là here would sound wrong for normal location meaning. Là is mainly for identity/equation sentences, like Đây là khách sạn = This is a hotel.

That is a very common question. They overlap somewhat, but they are doing slightly different jobs here.

• ở marks location: to be located
• trong specifies the spatial relationship: inside

So ở trong together gives the idea of is inside / is in.

You can think of it roughly as:

• ở khách sạn = at the hotel
• ở trong khách sạn = inside the hotel

In many everyday situations, both are natural, but ở trong is more explicit about being inside.

Sometimes, yes, but it is less complete as a full sentence. Hồ bơi ở trong khách sạn is the clearest standard sentence.

Without ở, hồ bơi trong khách sạn can sound more like a noun phrase, such as:

• the swimming pool in the hotel

rather than a full statement:

• The swimming pool is in the hotel

So if you want a full basic sentence, keep ở.

Vietnamese location sentences are usually very straightforward:

thing + ở + place

So:

• Hồ bơi = the swimming pool
• ở trong khách sạn = is in the hotel

English also starts with the thing, but it needs the verb is. Vietnamese does not insert an extra verb like English does here; ở already handles the location idea.

Vietnamese does not use articles the same way English does. There is no direct equivalent that must appear before nouns in sentences like this.

So hồ bơi can mean:

• the swimming pool
• a swimming pool

The exact meaning depends on context. If the pool is already known, English will often translate it as the swimming pool. If it is being introduced for the first time, English might use a swimming pool.

Not here. A bare noun like hồ bơi is perfectly normal.

Classifiers are more likely when you are:

• counting something
• pointing something out
• making the noun phrase more specific in a particular way

For example:

• một hồ bơi = one swimming pool / a swimming pool
• cái hồ bơi này = this swimming pool

But in a simple statement like this, no classifier is necessary.

Both can relate to the same real-world situation, but the focus is different.

• Hồ bơi ở trong khách sạn = The swimming pool is in the hotel.

  • Focus: the location of the swimming pool

• Trong khách sạn có hồ bơi = There is a swimming pool in the hotel.

  • Focus: the existence of a swimming pool in the hotel

So the first one starts with the pool; the second one starts with the hotel.

It is a noun phrase/compound noun made from smaller parts:

• hồ = lake / pool
• bơi = swim

Together, hồ bơi means swimming pool. Even though it has two parts, learners should treat it as one common vocabulary item.

The tone marks are:

• hồ — grave accent, low/falling tone
• bơi — no tone mark, level tone
• ở — hook mark, hỏi tone
• trong — no tone mark, level tone
• khách — acute accent, rising tone
• sạn — dot below, heavy/glottalized tone

So one important thing for learners is not just the consonants and vowels, but also keeping the tones distinct. In particular, ở and sạn are worth extra practice because their tones are harder for many English speakers.

Yes, it is natural and correct. It is a normal way to say where the swimming pool is.

Depending on context, a speaker might also say:

• Hồ bơi nằm trong khách sạn
  This can sound a bit more descriptive, like The swimming pool is located in the hotel.

But Hồ bơi ở trong khách sạn is perfectly good everyday Vietnamese.