Atrium amplum multos hospites habet.

In Latin, atrium is the subject because it is in the nominative singular form. For a neuter second-declension noun like atrium, the nominative singular ends in -um.

So here:

• atrium = the atrium / the hall as the subject
• habet = has

Latin often shows grammatical roles by endings, not just by word order. Even though English depends heavily on position, Latin depends more on case.

Amplum is an adjective meaning large or spacious, and it agrees with atrium.

Latin adjectives must match the noun they describe in:

• gender
• number
• case

Here:

• atrium is neuter
• singular
• nominative

So the adjective must also be neuter singular nominative:

• atrium amplum = a large atrium

Because atrium is neuter, the adjective takes the neuter form amplum, not amplus or ampla.

Because multos hospites is the direct object, not the subject.

The verb habet means has, so the sentence is structured like:

• subject: atrium amplum
• verb: habet
• direct object: multos hospites

Latin marks direct objects with the accusative case. So:

• hospites is accusative plural
• multos agrees with it in accusative plural masculine

That is why these words look different from the nominative subject phrase atrium amplum.

Because hospites here is the direct object, so it must be in the accusative plural. The adjective multos must agree with it.

Compare:

• multi hospites = many guests as a subject
• multos hospites = many guests as a direct object

In this sentence, the atrium has many guests, so many guests is what is being had, and that requires the accusative:

• multos hospites

They do, but the exact ending depends on the declension and the noun.

Hospes, hospitis is a third-declension noun. Its accusative plural is hospites.

So:

• nominative singular: hospes
• accusative singular: hospitem
• nominative plural: hospites
• accusative plural: hospites

In this noun, the nominative plural and accusative plural happen to look the same. That is normal for many third-declension nouns.

So even though hospites is the object, it still has the correct accusative plural form.

You learn that from the dictionary form of the noun and its meaning.

The noun is:

• hospes, hospitis = guest, host, or stranger

It is generally treated as masculine unless context shows a female person. Since the adjective is multos, we can also see that Latin is treating hospites here as masculine plural.

So:

• multos = masculine accusative plural
• therefore hospites is being understood as masculine here

Habet is:

• present tense
• active voice
• indicative mood
• third person singular

It means he/she/it has.

It is singular because its subject, atrium amplum, is singular:

• the large atrium has...

If the subject were plural, the verb would also be plural:

• Atria ampla multos hospites habent = Large atriums have many guests

It matters somewhat, but not as strictly as in English.

The basic meaning comes from the endings, not mainly from the position:

• atrium amplum = nominative subject
• multos hospites = accusative object
• habet = verb

So Latin could rearrange the words and still keep the same basic meaning, for example:

• Multos hospites atrium amplum habet
• Atrium multos hospites amplum habet would be much less natural because it splits the adjective oddly, but the endings still help identify the roles.

That said, the given order is very natural and clear:

• subject first
• object next
• verb last

This is a common Latin pattern.

Classical Latin has no articles like English the or a/an.

So:

• atrium can mean an atrium or the atrium
• hospites can mean guests or the guests, depending on context

English must choose an article, but Latin often leaves that idea to be understood from the situation.

Yes. Latin words often cover a range of meanings that English translates in different ways.

• atrium can refer to an atrium, central hall, or similar space depending on context.
• amplus can mean large, spacious, ample, or roomy.

So several English translations may be possible, even though the Latin grammar stays the same.

Latin does not always keep adjectives right next to their nouns, but when it does, it often makes the phrase easier for beginners to recognize.

Here we have two neat pairs:

• atrium amplum
• multos hospites

This makes the structure easy to see:

• subject phrase
• object phrase
• verb

Latin authors sometimes separate adjectives from nouns for style or emphasis, but in a simple teaching sentence, keeping them together is very common and helpful.