הבחורה הזאת עובדת במלון.

The prefix ה־ is the Hebrew definite article, equivalent to the in English.

• בחורה = a girl / young woman
• הבחורה = the girl / the young woman

In this sentence, הבחורה הזאת means this girl / this young woman.

In Hebrew, demonstratives like this usually come after the noun.

So Hebrew says:

• הבחורה הזאת = literally the girl this

But in natural English, we translate it as this girl.

This is a very normal Hebrew word order:

• הספר הזה = this book
• העיר הזאת = this city

When a Hebrew noun is modified by this / that, the noun is normally definite, so it usually takes ה־.

That is why you get:

• הבחורה הזאת = this girl

not normally:

• בחורה הזאת

Both parts show definiteness:

• הבחורה = the girl
• הזאת = this (feminine)

This is a standard Hebrew pattern.

Because בחורה is a feminine noun, and the demonstrative must match it in gender.

• זה = this for masculine nouns
• זאת = this for feminine nouns

Examples:

• הספר הזה = this book (masculine)
• הבחורה הזאת = this girl (feminine)

Hebrew verbs in the present tense agree with the subject in gender and number.

Since הבחורה is feminine singular, the verb is feminine singular:

• עובד = works / working for masculine singular
• עובדת = works / working for feminine singular

So:

• הבחור עובד = the young man works
• הבחורה עובדת = the young woman works

Yes. Hebrew present-tense forms often correspond to both simple present and present continuous in English.

So עובדת can mean:

• works
• is working

Which English version sounds best depends on context.

Hebrew does not usually make the same strict distinction that English does between:

• she works
• she is working

Hebrew often does not need a separate subject pronoun like she when the noun itself is already the subject.

Here, the subject is explicitly stated:

• הבחורה הזאת = this girl

So there is no need to add היא (she).

Hebrew could say היא עובדת, but that would mean she works / she is working without naming the person.

The preposition ב־ means in / at, and in Hebrew it attaches directly to the noun.

So:

• מלון = hotel
• במלון = in a hotel / at a hotel / in the hotel, depending on context

Hebrew commonly writes short prepositions like this as prefixes:

• ב־ = in / at
• ל־ = to / for
• כ־ = as / like

When ב־ combines with the definite article ה־, they merge.

So:

• ב + ה + מלון becomes במלון

This form can represent in the hotel.

However, in some contexts במלון may also be understood more generally as in a hotel / at a hotel, especially in simple sentences like this. Context usually tells you what sounds most natural in English.

This kind of contraction is very common in Hebrew:

• בבית = in the house
• בספר = in the book

One clue is that many masculine nouns do not have the common feminine ending ־ה or ־ת, though that is only a tendency, not a perfect rule.

The best way to know for sure is to learn the noun together with matching words:

• מלון גדול = a big hotel → גדול is masculine
• המלון הזה = this hotel → הזה is masculine

So מלון is masculine singular.

Yes. The preposition ב־ often covers both in and at in English, depending on context.

So עובדת במלון can naturally be translated as:

• works in a hotel
• works at a hotel

Both are reasonable English translations.

No. The verb here is already עובדת = works / is working.

Hebrew does often omit the verb to be in the present tense, but that applies to sentences like:

• הבחורה הזאת עייפה = this girl is tired

There, Hebrew has no separate word for is.

But in your sentence, the main verb is work, so nothing is missing:

• הבחורה הזאת עובדת במלון = this girl works / is working at a hotel

Yes, very normal.

Its structure is straightforward:

• הבחורה הזאת = subject
• עובדת = verb
• במלון = prepositional phrase

This is a standard Hebrew sentence pattern and sounds completely natural.