6.4 Case usage without prepositions

Nominative case functions

The nominative is the "default" case in Latin. It marks the subject of a sentence and shows up in a few other predictable spots. If you can identify the nominative, you've found who or what is driving the action.

Subject of sentence

The nominative identifies the main actor or topic of the sentence. It agrees with the main verb in person and number.

• Typically appears near the beginning, though Latin word order is flexible: Caesar venit (Caesar came)
• Can be a noun, pronoun, or substantive adjective
• Often omitted when the verb ending already makes the subject clear (e.g., venit alone can mean "he/she came")

Predicate nominative

A predicate nominative follows a linking verb like esse (to be), fieri (to become), or videri (to seem). It renames or describes the subject, so it stays in the nominative case rather than switching to accusative.

• Agrees with the subject in case, number, and gender
• Expresses equivalence or identity: Cicero est consul (Cicero is consul)
• Can be a noun, adjective, or pronoun
• Don't confuse this with a predicate accusative, which shows up with different verb constructions

Apposition

An appositive renames or further identifies another nominative noun. It agrees in case and number (and often gender) with the noun it describes.

• Often set off by commas: Caesar, imperator Romanus, venit (Caesar, the Roman commander, came)
• Can be a single word or a longer phrase
• Provides extra information without needing a relative clause

Accusative case functions

The accusative is the case of the direct object, but it does more than that. It also marks the subject of infinitives in indirect statement and can express duration or distance, all without a preposition.

Direct object

The accusative marks whatever receives the action of a transitive verb.

• Puer librum legit (The boy reads the book)
• Can be a noun, pronoun, or substantive adjective
• Some verbs take multiple direct objects (more on that in the verb constructions section below)

Note: the accusative also appears with certain prepositions (ad, in, per), but that's covered elsewhere in this unit. Here we're focused on prepositional-free uses.

Subject of infinitive

In indirect statement (after verbs of saying, thinking, knowing, perceiving), the subject goes into the accusative and the verb becomes an infinitive. This is true even though that noun is technically the "subject" of its clause.

• Dico Caesarem venire (I say that Caesar is coming)
• The accusative + infinitive construction is how Latin handles reported speech and thought
• Works with nouns, pronouns, and substantive adjectives

This is one of the trickiest constructions for beginners because your instinct says "subject = nominative," but indirect statement breaks that rule.

Extent of time or space

The accusative without a preposition expresses how long something lasted or how far something extended.

• Tres horas dormivi (I slept for three hours)
• Multa milia passuum ambulavit (He walked many miles)
• Often appears with cardinal numbers or quantity words

This differs from the ablative of time, which expresses when or within which time something happened. Duration = accusative. Point in time = ablative.

Genitive case functions

The genitive expresses relationships between nouns. Possession is the most common, but it also handles description and partitive ("part of") constructions. You'll usually translate it with "of" or an apostrophe-s.

Possession

The genitive indicates ownership or close association. It usually follows the noun it modifies.

• Liber pueri (The boy's book / The book of the boy)
• Can express authorship, origin, or characteristic beyond simple ownership
• In some contexts, a possessive adjective (meus, tuus, suus) replaces the genitive

Description

The genitive of description characterizes another noun, typically using a noun + adjective combination.

• Vir magnae virtutis (A man of great virtue)
• Can express age, size, quality, or other attributes
• Latin also has an ablative of description that works similarly. The genitive version tends to describe more permanent or inherent qualities, though the distinction isn't always rigid at the introductory level.

Partitive genitive

The partitive genitive expresses the whole from which a part is taken. It shows up with words of number, quantity, or comparison.

• Pars militum (Part of the soldiers)
• Also appears with superlatives: fortissimus militum (the bravest of the soldiers)
• In later Latin, ex or de + ablative sometimes replaces the partitive genitive

Dative case functions

The dative marks the indirect object and expresses who benefits from, is affected by, or is interested in an action. It also has a few specialized uses that are worth knowing.

Indirect object

The indirect object is the person to whom or for whom something is done. It receives the direct object or benefits from the verb's action.

• Puer puellae librum dat (The boy gives the book to the girl)
• Common with verbs meaning to give, show, tell, or send
• Some verbs take a dative without any direct object at all: credo (believe/trust), pareo (obey), placeo (please). These are important to memorize because they look like they should take accusative objects but don't.

Possession

The dative of possession uses esse to express ownership, but it emphasizes the possessor rather than the thing possessed.

• Puero est liber (The boy has a book; literally, "A book is to the boy")
• Often interchangeable with the genitive of possession, but the dative construction highlights who has something
• Shows up in idiomatic expressions: nomen est mihi Marcus (My name is Marcus)

Agent with passive periphrastic

The passive periphrastic (gerundive + a form of esse) expresses obligation or necessity. The person who must perform the action goes in the dative, not the ablative.

• Caesari pugnandum est (Caesar must fight; literally, "Fighting is to be done by Caesar")
• This is different from the regular passive voice, where the agent takes a/ab + ablative
• When no specific agent is named, the construction becomes impersonal: pugnandum est (one must fight / fighting must be done)

Ablative case functions

The ablative is the Swiss Army knife of Latin cases. It covers means, manner, accompaniment, time, separation, and more. Many of these uses require no preposition at all, which is why recognizing them matters so much.

Means or instrument

The ablative of means indicates the tool or method used to perform an action. No preposition is needed.

• Gladio pugnant (They fight with a sword)
• Can be abstract as well as physical: virtute vincunt (They conquer by/through courage)
• Translate as "by means of" or "with"

Manner

The ablative of manner expresses how an action is performed. The rule for cum:

• If the noun has an adjective, cum is optional and often omitted: magna cura scribit or magna cum cura scribit (He writes with great care)
• If the noun stands alone without an adjective, use cum: cum cura scribit (He writes with care)

This differs from ablative of means because manner describes the style of the action, not the tool.

Accompaniment

The ablative of accompaniment indicates a person or thing going along with the subject. In classical Latin, it always uses cum.

• Cum amicis ambulat (He walks with friends)
• Military contexts sometimes drop cum: omnibus copiis profectus est (He set out with all his forces)
• Don't confuse this with ablative of means, which never uses cum

Time when or within which

The ablative without a preposition expresses the point in time at which or the period within which something happens.

• Hieme venit (He comes in winter)
• Tribus diebus pervenit (He arrived within three days)

Remember the contrast with the accusative: accusative = how long (duration), ablative = when or within which time.

Specification

Also called the ablative of respect, this limits in what way a statement is true.

• Claudus pede (Lame in respect to his foot / Lame in foot)
• Used with adjectives, verbs, and nouns to narrow their application
• Translate as "in respect to" or "in"

Ablative of separation

This ablative indicates movement away from or removal from something. Some verbs of separation take a bare ablative; others use a/ab, de, or ex.

• Urbe exiit (He left the city)
• Common with verbs of freeing, depriving, or lacking: metu liberare (to free from fear)
• Can express literal or figurative separation

Case usage in special constructions

A few constructions use cases in ways that don't fit neatly into the categories above. These are worth learning as set patterns.

Ablative absolute

An ablative absolute is an independent phrase that adds context (time, cause, circumstance) to the main clause. It consists of a noun or pronoun in the ablative paired with a participle (or another noun/adjective) also in the ablative.

• Urbe capta, milites discesserunt (With the city having been captured, the soldiers departed / After the city was captured, the soldiers departed)
• The key rule: the noun in the ablative absolute should not be the subject or object of the main clause. If it is, use a participial phrase instead.
• Translate flexibly as "when," "after," "since," or "although" depending on context

Locative case

The locative is a surviving remnant of an old case used to express "place where." It only appears with:

• Names of cities and small islands: Romae vivit (He lives in Rome), Athenis (at Athens)
• A handful of common nouns: domi (at home), ruri (in the country), humi (on the ground)
• Distinct locative forms exist only in the 1st and 2nd declension singular (e.g., Romae, Corinthi). Other declensions use the ablative for location.

Vocative case

The vocative is used for direct address. Its forms are identical to the nominative in every declension except 2nd declension masculine singular (where -us becomes -e and -ius becomes -i).

• Quo vadis, domine? (Where are you going, lord?)
• Often set off by commas
• Can appear with interjections like O

Case agreement

Adjectives and nouns

Adjectives agree with the nouns they modify in case, number, and gender. This applies to attributive adjectives (next to the noun), predicate adjectives (after a linking verb), and demonstratives/possessives.

• Agreement is how you figure out which adjective goes with which noun, especially when words are separated in a sentence
• Some common adjectives have irregular forms (bonus, magnus, malus), but the agreement principle stays the same

Relative pronouns

Relative pronouns (qui, quae, quod) follow a split rule:

• They agree with their antecedent in number and gender
• They take their case from their function inside the relative clause

So if the antecedent is a feminine singular noun but the pronoun serves as a direct object in its clause, you'd use quam (feminine singular accusative). The antecedent's case doesn't matter for the pronoun's case.

Common mistakes in case usage

Nominative vs. accusative

• Neuter nouns are especially tricky because their nominative and accusative forms are identical. You have to rely on context and verb meaning.
• In indirect statements, the subject is accusative (not nominative). Students often forget this.
• Don't let word order fool you. Latin word order is flexible, so the first noun in a sentence isn't necessarily the subject.

Genitive vs. dative

Both cases can express possession, which causes confusion. Here's the distinction:

• Genitive of possession modifies a noun directly: liber pueri (the boy's book)
• Dative of possession uses esse and emphasizes the possessor: puero est liber (the boy has a book)

Also watch for verbs that unexpectedly take genitive objects, like memini (remember) and obliviscor (forget).

Dative vs. ablative

• The dative marks indirect objects and is used with verbs like pareo and placeo
• The ablative marks means/instrument and uses a/ab for agent with regular passive verbs
• The passive periphrastic uses dative of agent, not ablative. This is a common exam mistake.

Case-specific verb constructions

Certain verbs break the standard nominative-subject / accusative-object pattern. Knowing which case a verb requires is something you'll need to memorize, but here are the main categories.

Verbs with double accusative

Some verbs take two accusative objects: one for the person and one for the thing.

• Magister pueros grammaticam docet (The teacher teaches the boys grammar)
• Common verbs: doceo (teach), rogo (ask), celo (conceal from)
• In the passive, both accusatives become nominatives

Verbs with genitive object

Certain verbs require their objects in the genitive. These include verbs of:

• Remembering and forgetting: memini, obliviscor
• Accusing and condemning: accuso, damno (the genitive often names the charge)
• Some of these verbs can also take an accusative with a slight shift in meaning

Verbs with dative object

Many common verbs take a dative where English would lead you to expect an accusative:

• faveo (favor), credo (believe/trust), pareo (obey), noceo (harm), persuadeo (persuade)
• These verbs express the person affected by or interested in the action
• Some verbs change meaning with different cases: consulo + accusative = consult; consulo + dative = provide for