Contignatio duo conclavia habet.

The subject is contignatio.

That is the thing doing the action of having. The verb habet means has, so contignatio is the thing that has something.

The thing being had is duo conclavia.

Because the verb agrees with the subject, not with the object.

• contignatio = the subject = singular
• duo conclavia = the object = plural

So Latin uses habet = has (singular), not habent = have (plural).

In other words, the sentence means that one floor/story has two rooms, so the verb stays singular.

Because duo agrees with conclavia, not with contignatio.

• contignatio is feminine, but it is not the noun being counted
• conclavia is neuter plural
• the numeral two must match the noun it modifies in gender

Forms of two:

• masculine: duo
• feminine: duae
• neuter: duo

So duo conclavia is correct because conclavia is neuter.

• contignatio is nominative singular
• conclavia is accusative plural

Why?

• The subject of a Latin sentence is normally in the nominative
• The direct object of a verb like habet is normally in the accusative

So:

• contignatio = the thing that has
• conclavia = the things that are had

Because conclavia is a neuter plural form.

For many neuter nouns in Latin, the nominative and accusative plural end in -a. So even though -a often looks singular to beginners, here it is actually plural.

That means:

• singular: conclave
• plural: conclavia

So conclavia really does mean rooms/chambers, not room/chamber.

It is accusative plural neuter, because it goes with conclavia, which is accusative plural neuter.

With the numeral two, Latin usually makes the number agree with the noun in gender, number, and case.

So in duo conclavia:

• duo matches conclavia
• both are neuter plural
• both are in the accusative because they form the direct object

Habet is the third-person singular present active indicative of habere, meaning to have.

So habet means:

• he has
• she has
• it has

Since contignatio is a thing, the natural sense is it has, or in full, the floor/story has.

The ending -t is the important clue: it marks third-person singular.

Because Latin normally does not use articles.

English must choose between a/an and the, but Latin usually leaves that to context.

So contignatio duo conclavia habet could be understood in English as something like:

• The floor has two rooms
• A floor has two rooms

Which one is best depends on the context.

No. Latin word order is much more flexible than English word order.

This sentence has a very natural Latin order:

• contignatio = subject
• duo conclavia = object
• habet = verb

But Latin could also say:

• Contignatio habet duo conclavia
• Duo conclavia contignatio habet

The basic meaning would stay the same because the endings show the grammatical roles. A different order usually changes emphasis, not the core meaning.

Yes, if the subject were already clear from the context.

Latin often omits a subject pronoun or even a repeated subject noun because the verb ending already tells you the person and number. Habet already means he/she/it has.

So Duo conclavia habet could mean It has two rooms, if everyone already knows what it refers to.

Here, contignatio is included to make the subject explicit.