What Case Is

Say 'The dog bit the man' and then 'The man bit the dog'. The words are the same and the news is very different. English tells you who did what almost entirely by order: the noun before the verb is usually the one acting, and the noun after it is usually the one acted on. Swap the positions and you swap the roles. That is so natural to an English speaker that it feels like the way language must work.

It is not. English still keeps a small fossil of another way of working, and you use it every day. You say 'he saw her' and 'she saw him', not 'he saw she'. He and him, she and her, who and whom, they and them: these pairs are the same person in different forms, and the form tells you the job. Him cannot be the subject of a sentence however you arrange the words. 'Him the dog bit' is clumsy English, but nobody would think the dog was bitten.

Greek works that way with almost every noun, not just a few pronouns. A Greek noun changes its ending to show what it is doing in the sentence, and the article, the adjectives and the pronouns that go with it change their endings to match. Those forms are called cases. A case is simply the shape a word takes to show its job. The ancient Greek grammarians called a case πτῶσις (ptōsis, a falling), picturing a word as falling into different forms from its basic one, and the Latin grammarians translated that as casus, which is where our word case comes from.

New Testament Greek has five case forms. The nominative names the subject, the one the sentence is about. The genitive is very roughly the of-case, and does a great deal more besides. The dative is roughly the to, for, by, in or with case. The accusative names the direct object, the thing acted on. The vocative is the form used to address someone, as in Πάτερ ἡμῶν (Pater hēmōn, Father of us, our Father) in Matthew 6:9. This module takes them in turn: this lesson the nominative and accusative, then the article that travels with them, then a lesson each on the genitive and the dative, and finally the prepositions, which are always followed by one case or another.

One honest note about counting. Some older grammars, among them A. T. Robertson's large Grammar of the Greek New Testament in the Light of Historical Research (1914) and the Dana and Mantey grammar that taught generations of American pastors, speak of eight cases rather than five. They are not describing different Greek. They are counting by function where most grammars now count by form: since one dative ending can express location, means and personal interest, they gave each function its own case name. The forms on the page are the same in both systems. If an older book mentions the ablative or the instrumental case, it is talking about uses of the genitive and the dative.

One more thing a case carries is grammatical gender: masculine, feminine or neuter. This is a property of words, not of what they name. λόγος (logos, word) is masculine, ἀρχή (archē, beginning) is feminine, and πνεῦμα (pneuma, spirit, wind, breath) is neuter. Nothing follows from that about whether the Holy Spirit is a person; a neuter word for spirit no more makes the Spirit a thing than the feminine word for faith makes faith a woman. The church's teaching that the Spirit is personal rests on what the Spirit does in the text, speaking, teaching, interceding, being grieved, not on the gender of a noun, and a student should never argue either way from grammatical gender alone.

Greek nouns fall into three families, called declensions, and each family has its own set of endings. You do not need to memorise them all to use the tools well, because the tools will tell you the case of any word you tap. But you need to recognise the commonest endings, so that a parsing code means something when you see it and so that you can catch a tool when it is wrong. Below, each line is one row of a table. Read across: the case, its main job, then the forms.

Table 1, the article, which means the and has no exact plural or gender in English. Columns: masculine, feminine, neuter. Nominative singular (subject): ὁ, ἡ, τό. Genitive singular (of): τοῦ, τῆς, τοῦ. Dative singular (to, for, by, in): τῷ, τῇ, τῷ. Accusative singular (object): τόν, τήν, τό. Nominative plural: οἱ, αἱ, τά. Genitive plural: τῶν, τῶν, τῶν. Dative plural: τοῖς, ταῖς, τοῖς. Accusative plural: τούς, τάς, τά. Notice that the genitive plural is the same in all three genders, and that the neuter nominative and accusative are always identical.

Table 2, the second declension, mostly masculine nouns, with λόγος (logos, word) as the pattern. Nominative singular: λόγος. Genitive singular: λόγου. Dative singular: λόγῳ. Accusative singular: λόγον. Vocative singular: λόγε. Nominative plural: λόγοι. Genitive plural: λόγων. Dative plural: λόγοις. Accusative plural: λόγους. θεός (theos, God), κόσμος (kosmos, world), υἱός (huios, son) and νόμος (nomos, law) all follow this pattern, which is why θεοῦ means of God and τὸν κόσμον means the world as the object of a verb.

Table 3, the first declension, mostly feminine nouns, with ἀρχή (archē, beginning) as the pattern. Nominative singular: ἀρχή. Genitive singular: ἀρχῆς. Dative singular: ἀρχῇ. Accusative singular: ἀρχήν. Nominative plural: ἀρχαί. Genitive plural: ἀρχῶν. Dative plural: ἀρχαῖς. Accusative plural: ἀρχάς. The Ἐν ἀρχῇ (En archē, in the beginning) of John 1:1 is this word in the dative after the preposition ἐν. Many first declension nouns have α where ἀρχή has η, as δόξα (doxa, glory) does, but the pattern of change is recognisably the same.

Table 4, the third declension, for recognition only, because its stems vary. Read each line as nominative, genitive, dative, accusative singular. πνεῦμα (pneuma, spirit): πνεῦμα, πνεύματος, πνεύματι, πνεῦμα. χάρις (charis, grace): χάρις, χάριτος, χάριτι, χάριν. πίστις (pistis, faith): πίστις, πίστεως, πίστει, πίστιν. The marks to watch for are a genitive in -ος or -εως and a dative ending in -ι. If you see πνεύματι or πίστει, think dative; if you see πίστεως, think genitive.

How the tools show this. Blue Letter Bible uses a code from the Robinson morphology: N-NSM means noun, nominative, singular, masculine; N-DSF means noun, dative, singular, feminine. The order inside the code is always case, number, gender. STEP Bible spells the same thing out in words when you tap a word. If two tools disagree about a form, do not pick the one you like; look at the endings in the tables above and see which parsing they support. Where the form itself is ambiguous, as neuter nominative and accusative always are, you will learn below that the tool has already made a judgment from context, and you are entitled to check it.

The nominative names the subject. In John 3:16 the SBL Greek New Testament (SBLGNT) reads Οὕτως γὰρ ἠγάπησεν ὁ θεὸς τὸν κόσμον (Houtōs gar ēgapēsen ho theos ton kosmon, for in this way God loved the world). The verb ἠγάπησεν comes first. Then ὁ θεὸς, article and noun both nominative singular masculine: that is the one who loved. Then τὸν κόσμον, article and noun both accusative singular masculine: that is what was loved. The roles are fixed by the endings. You could move κόσμον to the front and θεὸς to the end, and a Greek reader would still know who loved whom.

The same verse shows the accusative doing its commonest work twice more. τὸν υἱὸν τὸν μονογενῆ ἔδωκεν (ton huion ton monogenē edōken, he gave the one and only Son) puts the object first and the verb last, the reverse of English order, and the accusative endings on the article, the noun and the adjective make the meaning certain. Later, ζωὴν αἰώνιον (zōēn aiōnion, eternal life) is accusative because it is the object of ἔχῃ, may have. A student who can find the nominative and the accusative in a sentence can find its skeleton: who, does what, to what.

The nominative has a second job worth knowing early. After the verb to be, and verbs like it, Greek uses the nominative for the thing said about the subject as well as for the subject itself. So in John 1:1 both θεὸς and ὁ λόγος are nominative in καὶ θεὸς ἦν ὁ λόγος (kai theos ēn ho logos, and the Word was God). The endings cannot tell you which is the subject, because both have the same case. Something else has to, and Module 1 has already shown you what: the article, which stands with λόγος and not with θεὸς. The next lesson explains how the article does that, and the debate about John 1:1 belongs to Module 1 and is not repeated here.

The accusative has other uses too. It follows many prepositions: in John 1:1 πρὸς τὸν θεόν (pros ton theon, with God, literally toward God) is accusative because πρός takes the accusative when it means toward or with. It can express extent of time or space, as in an accusative of how long. And it serves as the subject of an infinitive, which you will meet in Module 5. For now, the rule of thumb that serves best is the simple one: the accusative is the case of the thing the action lands on.

Now the warning that every student needs before trusting a tool. Neuter nouns have the same form in the nominative and the accusative. τὸ δῶρον, the gift, could be either. πνεῦμα could be either. In John 4:24 πνεῦμα is nominative; in Romans 8:4, κατὰ πνεῦμα (kata pneuma, according to the Spirit) has exactly the same spelling and is accusative, because κατά takes the accusative when it means according to. So when your tool tells you a neuter noun is nominative, it has not read that off the ending. It has read it off the sentence, and made a judgment. Almost always the judgment is easy and correct. But this is the first place you will see a pattern that runs through the whole track: some of what a tool presents as data is already interpretation.

Because the endings carry the roles, Greek word order is far freer than English. Romans 5:8 shows how far. The SBLGNT begins συνίστησιν δὲ τὴν ἑαυτοῦ ἀγάπην εἰς ἡμᾶς ὁ θεὸς (synistēsin de tēn heautou agapēn eis hēmas ho theos), word for word 'shows but the of-himself love toward us the God'. The verb is first, the object is second, a prepositional phrase is third, and the subject, ὁ θεὸς, arrives last. The BSB rightly makes good English of it: 'But God proves His love for us in this'. Nothing has been lost, because nothing in the Greek depended on where ὁ θεὸς stood.

Free does not mean meaningless. Greek writers had a normal way of arranging a clause and could depart from it, and one common reason for departing was to bring something forward for attention. Ephesians 2:8 opens τῇ γὰρ χάριτί ἐστε σεσῳσμένοι (tē gar chariti este sesōsmenoi, for by grace you have been saved). The phrase 'by grace' stands at the head of the sentence. Many commentators take that as Paul putting grace in front deliberately, since 2:5 has already said it once: 'It is by grace you have been saved!' The little word γάρ, for, cannot stand first in a Greek clause, so it comes second, which is why it sits inside the phrase about grace.

Two cautions keep that kind of observation honest. First, some orders that look unusual to an English eye were ordinary in Greek, and treating every departure from English order as emphasis will make Paul shout on every line. Second, emphasis is a matter of degree and of the writer's habits, and grammarians have argued at length about how to measure it. Writers such as Stephen Runge, in his Discourse Grammar of the Greek New Testament (2010), have tried to describe the patterns carefully; others are more sceptical about how much weight any single case of fronting can bear. Module 6 has a whole lesson on word order and emphasis. For now, say that a word stands first and may be in focus, and say why you think so, rather than announcing that 'the Greek emphasises' it.

Ephesians 2:8 also shows two features of Greek order that have nothing to do with emphasis. The clause θεοῦ τὸ δῶρον (theou to dōron, the gift of God) has no verb at all. Greek often leaves out the verb to be where the sense is clear, and the BSB supplies 'it is'. And the genitive θεοῦ comes before the noun it qualifies, which English cannot do with of-phrases, so the BSB moves it. Neither change is a liberty taken by the translator. Both are what turning Greek into English requires.

One word in the verse has been argued over for centuries, and it is a case question. καὶ τοῦτο (kai touto, and this) is neuter, while the words for grace and faith are both feminine, so the question of what 'this' refers to cannot be settled by simple agreement of gender. The Hermeneutics track's lesson Grammar That Changes the Meaning works through that debate, and this lesson will not repeat it. What matters here is the method it models: when a question turns on agreement, look at the case, number and gender of every word involved, and say what the forms rule in and rule out before you say what you believe.

Here is the whole first clause of the verse as the SBLGNT prints it, with each word parsed the way a tool will show it. Do this with the tool open beside you, tapping each word in turn, and check that what you see matches what is written here. If your tool displays a slightly different Greek text, it may be showing the Textus Receptus, the printed text behind the King James Version, which differs from the SBLGNT at a number of small points in the New Testament; Module 8 explains why texts differ and how to weigh them.

τῇ: the article, dative singular feminine, agreeing with the next noun. γὰρ: for, a conjunction, which has no case. χάριτί: χάρις, grace, dative singular feminine; the extra accent on its last syllable is there because the next word, ἐστε, leans its accent back onto it, and it does not change the word. ἐστε: εἰμί, to be, present active indicative, second person plural, you are. σεσῳσμένοι: σῴζω, to save, a perfect passive participle, nominative plural masculine, having been saved. Together ἐστε σεσῳσμένοι make one idea, you have been saved, a construction Module 4 will explain when it reaches the perfect.

διὰ πίστεως: διά, through, a preposition, followed by πίστις, faith, in the genitive singular feminine, because διά takes the genitive when it means through. καὶ τοῦτο: and this, the demonstrative pronoun, singular neuter, which tools parse as nominative because it is the subject of a verbless clause. οὐκ ἐξ ὑμῶν: not out of you, the preposition ἐκ (spelled ἐξ before a vowel) followed by the genitive plural of the pronoun you. θεοῦ τὸ δῶρον: θεός, God, genitive singular masculine, and δῶρον, gift, with its article, nominative singular neuter.

Now read your parsing back as a structure rather than a list. The skeleton is ἐστε σεσῳσμένοι, you have been saved, and its subject is in the verb, you plural, the Ephesian believers. Hanging from it are two phrases that say how: a bare dative, by grace, and a prepositional phrase, through faith. Then a new clause with its own subject, this, and its own description: not from you, God's gift. The cases did all of that. No English word order was needed to tell you which phrase belonged to which.

Finally, what the cases do not settle. They tell you that grace is in the dative and faith in the genitive after διά, but the label you give the dative, means or cause or sphere, is a reader's judgment, and lesson 4 will show you how to make it. They tell you that τοῦτο is neuter, but not by themselves what it points to. And they cannot tell you what grace or faith mean; that is the work of lexicons and of reading Paul, which Module 2 began and Module 7 continues. Case is the floor of interpretation, not the ceiling. But a floor you can stand on is worth having, and most readers of English Bibles have never stood on it.

Every lesson in this module adds one layer to a single study in your notebook, and that study grows into the capstone at the end of the track: a full study of one passage of your own choice. If you have already chosen your passage, use it. If not, choose one now: a paragraph of five to twelve verses from one of Paul's letters or from John's Gospel, a passage you expect to preach or teach in the coming months. At the top of a fresh page write the reference and the words: Case map.

First, on your phone, open the first verse of your passage on STEP Bible or Blue Letter Bible and display the Greek. Copy the Greek of the first two verses into your notebook, one line per clause, leaving a space under each word. Copy carefully, letter by letter; your hand learns the shapes faster than your eye does.

Second, tap each noun, article and pronoun in turn and write its case under it in your notebook, using a single letter: N for nominative, G for genitive, D for dative, A for accusative, V for vocative. Then circle every nominative and draw a box round every accusative. Under each clause write one line in English: who, does what, to what.

Third, look for any neuter noun whose case your tool has given you, and write beside it the reason you think the tool chose nominative or accusative. And mark any place where the subject or the object does not stand where English would put it. You will use this case map in every lesson that follows, so keep it on its own page and leave room under each word for more marks.