Mater olivas in foro emit.

Because mater is the subject of the sentence (“mother” is doing the buying). Subjects are usually in the nominative case, and mater is the nominative singular form.

Olivas is accusative plural, because it is the direct object: it answers “what did she buy?” → olives.
It comes from oliva, olivae (1st declension feminine). The accusative plural ending for 1st declension is -ās, so oliva → olivās.

The Latin form tells you the number: olivas is explicitly plural (“olives”), while olivam would mean “an olive / one olive” (accusative singular). Latin often uses the plural for things typically bought in quantities.

in foro expresses location: “in the forum / at the marketplace.”
With in:

• in + ablative = location (where?) → in forō
• in + accusative = motion toward (where to?) → in forum

Here it’s forō (ablative), so it means she is already there while buying.

Because forō is ablative singular, used after in to mean “in/at” a place (location).
forum would be accusative singular, which after in would mean motion into the forum (“into the forum”), not simply “in the forum.”

Forum is 2nd declension neuter (forum, -ī).
The form forō is the ablative singular ending -ō, which is common for 2nd declension nouns. It signals the phrase is using the location meaning of in.

Emit is present tense, 3rd person singular: “she buys / is buying.”
It’s from emō, emere, ēmī, ēmptum (“to buy”).
The -t ending typically marks he/she/it in many Latin tenses.

Because Latin verbs carry person and number in their endings. Emit already means “he/she/it buys.” Since mater is present, it’s clear it means “the mother buys.” Latin often omits pronouns unless they add emphasis or contrast.

Latin word order is flexible because case endings show grammatical roles. You could write, for example:

• Mater emit olivas in foro.
• In foro mater olivas emit. They would still mean the same basic thing. However, word order can affect emphasis (what feels highlighted), even if the core meaning stays the same.

Yes. Putting it first (In foro mater olivas emit) often foregrounds the setting (“In the forum…”). Latin commonly places time/place phrases early, but it’s not required.

• mater → māter, mātris (mother)
• olivas → olīva, olīvae (olive)
• in → in (in/on; takes ablative for location, accusative for motion)
• foro → forum, forī (forum/marketplace)
• emit → emō, emere, ēmī, ēmptum (buy)

Approximately:

• Māter ≈ MAH-ter (long ā)
• olīvās ≈ oh-LEE-wahs (long ī, final -ās)
• in ≈ in
• forō ≈ FOH-roh (long final ō)
• emit ≈ EH-mit