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The 5 Latin cases in plain English — what each one does, when you use it, and how to remember it. A homeschool parent's reference for Classical Conversations, Henle Latin, First Form, and other classical programs.
English shows the role of a word mostly through word order. “The dog bit the boy” means something different from “The boy bit the dog” because we read left to right and expect the subject first.
Latin doesn't need word order to do that. Instead, it changes the endings of nouns to tell you what each word is doing. A Latin sentence can scramble its words in almost any order and still mean the same thing, because the endings carry the grammar. That is what a “case” is: a set of endings that identify what role a noun is playing in a sentence.
Latin has 5 cases that your student will use constantly (plus a 6th, the vocative, for direct address, which is almost always the same as the nominative). Learn these 5 thoroughly and you can read Latin at the beginner level.
Most classical Latin curricula teach the cases in this order, chanted out loud until it becomes automatic:
Nominative · Genitive · Dative · Accusative · Ablative
Some teachers use the phrase “No Giant Dogs Attack Ants” to remember the order.
The case of the subject — who or what is doing the action.
Subject of the verb
The person or thing performing the action.
Puella cantat.— The girl sings.
Predicate nominative
A noun after a linking verb (is, are, was, were) that renames the subject.
Marcus est agricola.— Marcus is a farmer.
Memory Hook
If you can put it in front of 'is doing something,' it's nominative. The dictionary listing of a Latin noun is always its nominative singular.
The case of possession or description — whose or what kind.
Possession
Shows ownership, like English 's or 'of.'
liber puellae— the book of the girl / the girl's book
Description
Describes or qualifies another noun.
vir magnae virtūtis— a man of great courage
Partitive
Expresses a part of a whole.
pars mīlitum— part of the soldiers
Memory Hook
Think 'of the' — if you can translate with 'of' in English, it's almost always genitive. The genitive is also the form that tells you which declension a noun belongs to.
The case of the indirect object — to whom or for whom.
Indirect object
The person or thing receiving the direct object.
Magister librum puellae dat.— The teacher gives the book to the girl.
Dative of reference / interest
Shows who is affected by or interested in the action.
mihi labōrat— he works for me / in my interest
Dative with adjectives
Some adjectives take a dative (similar to, friendly to, etc.).
similis patrī— similar to his father
Memory Hook
Think 'to' or 'for' — the person on the receiving end. The word 'dative' comes from the Latin verb dare (to give), so dative = the case of giving.
The case of the direct object — whom or what the action acts on.
Direct object
The person or thing receiving the action directly.
Puer canem videt.— The boy sees the dog.
Motion toward (with prepositions)
After prepositions like ad (to), in (into), trans (across), per (through).
ad urbem— to the city
Duration of time or extent of space
How long an action lasts or how far something extends.
multōs annōs— for many years
Memory Hook
Direct object (whom/what) + motion toward + duration. If the thing is being 'done to' or something is moving 'toward' it, think accusative.
The Swiss-army-knife case: by, with, from, in, on — the case of circumstance.
Means / instrument
The tool or means by which something is done.
gladiō pugnat— he fights with a sword
Manner
The way or manner in which something is done.
magnā cum cūrā— with great care
Place where / when
After prepositions like in, sub, prō, dē.
in silvā— in the forest
Ablative absolute
An independent phrase that sets the scene for the main clause.
urbe captā— the city having been captured / with the city captured
Memory Hook
By, with, from, in, on, at — the 'circumstance' case. Some teachers say 'the ablative is anything left over.' That's half-joke, half-truth: if it isn't subject, possession, indirect, or direct object, it's probably ablative.
The endings change depending on which declension a noun belongs to. Here is the singular pattern for all 5 cases in the 5 declensions — the core of classical Latin memory work:
| Case | 1st Decl. | 2nd Decl. | 3rd Decl. | 4th Decl. | 5th Decl. |
|---|---|---|---|---|---|
| Nominative | -a | -us/-um | varies | -us | -ēs |
| Genitive | -ae | -ī | -is | -ūs | -eī |
| Dative | -ae | -ō | -ī | -uī | -eī |
| Accusative | -am | -um | -em | -um | -em |
| Ablative | -ā | -ō | -e | -ū | -ē |
For the plural endings and full declension paradigms, see our Latin declensions chart reference page.
Reading a chart once is not enough. The cases only become automatic through repetition, chanting, and working with real Latin sentences. Here is the rhythm most successful classical families use:
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