הילדה ביקשה מיץ קר, ולכן שמתי את הבקבוק על השולחן.

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

So:

• ילדה = a girl / girl
• הילדה = the girl

The same thing happens in השולחן:

• שולחן = table
• השולחן = the table

Hebrew usually attaches the directly to the noun as a prefix instead of writing it as a separate word.

Because the subject is feminine singular: הילדה = the girl.

The verb ביקשה is the past tense, 3rd person feminine singular form of לבקש = to ask for / to request.

Compare:

• הוא ביקש = he asked for
• היא ביקשה = she asked for

Since girl is feminine in Hebrew, the verb agrees with it and becomes ביקשה.

Here it means asked for or requested.

With a thing after it, לבקש often means to ask for something:

• ביקשה מיץ = she asked for juice

So in this sentence, it is not asking a question; it is requesting something.

In Hebrew, adjectives usually come after the noun, unlike in English.

So:

• מיץ קר = literally juice cold = cold juice

This is a very common Hebrew pattern:

• ילד קטן = a small boy
• בית גדול = a big house
• מים קרים = cold water

So the noun comes first, and the describing word follows it.

Because מיץ is a masculine singular noun, and the adjective must agree with it.

So:

• מיץ קר = cold juice
  masculine singular noun + masculine singular adjective

If the noun were feminine singular, the adjective would usually be feminine too:

• שתייה קרה = cold drink

Hebrew adjectives agree with nouns in gender and number.

ולכן means and therefore, and so, or simply so in this kind of sentence.

It is made of:

• ו- = and
• לכן = therefore / thus

So ולכן links the two parts of the sentence and shows result:

• The girl asked for cold juice, so I put the bottle on the table.

It is a slightly more formal or explicit way to show consequence than just plain so.

Because Hebrew verbs usually already show the subject.

שמתי means I put. The -תי ending tells you the subject is I.

So Hebrew often drops the pronoun when it is clear from the verb form.

Compare:

• שמתי = I put
• שמת = you put (masculine singular)
• שמה = she put
• שמו = they put

You can say אני שמתי for emphasis, but it is not necessary in a neutral sentence.

שמתי is the past tense, 1st person singular form of לשים = to put / to place.

So:

• לשים = to put
• שמתי = I put

The -תי ending is very common in the past tense for I:

• כתבתי = I wrote
• אמרתי = I said
• עשיתי = I did

This את is the direct object marker. It does not translate into English, but it marks a definite direct object.

So:

• שמתי בקבוק = I put a bottle
• שמתי את הבקבוק = I put the bottle

Because הבקבוק is definite (the bottle), Hebrew uses את before it.

A very important point: this את is not the preposition meaning with. Here it is just a grammatical marker.

You tell from the sentence structure.

In שמתי את הבקבוק על השולחן, הבקבוק is the thing being put, so it is the direct object. That is why את is the object marker here.

If את meant with, the sentence structure and meaning would be different.

For example:

• אני הולך אתך = I am going with you

That is a different use. In your sentence, את is followed by a definite noun and marks the direct object: the bottle.

Because את is only used for a direct object, not after a preposition.

Here, על השולחן means on the table:

• על = on
• השולחן = the table

Since השולחן is part of a prepositional phrase, not a direct object, Hebrew does not use את here.

So:

• שמתי את הבקבוק = direct object → use את
• על השולחן = after a preposition → no את

This is about context, not just grammar.

Hebrew often uses a definite noun when the speaker and listener both know which thing is meant, or when the item is obvious from the situation.

So הבקבוק means the bottle, probably a bottle already known in the conversation or visible in the scene.

English works similarly:

• She asked for cold juice, so I put the bottle on the table.

That sounds natural if both people know which bottle is being referred to.

Yes, it is very natural.

The sentence is:

• הילדה ביקשה מיץ קר
• ולכן שמתי את הבקבוק על השולחן

The first clause is basically:

• subject + verb + object

The second clause begins with a connector:

• and therefore + verb + object + prepositional phrase

Hebrew word order is flexible, but this is a very standard and natural arrangement.

Yes. Hebrew often allows more than one natural phrasing.

For example, the second clause could be phrased differently depending on emphasis. But your sentence is perfectly normal and clear.

A few things might vary in other sentences:

• whether the speaker says אני שמתי or just שמתי
• whether a different connector is used instead of ולכן
• whether word order is adjusted for emphasis

Still, the version you have is straightforward standard Hebrew.