The genitive case has four functions. It is widely rumored that the genitive case is falling out of usage in German. This statement only applies conditionally to certain functions of the genitive; these will be noted below.

1) Possession & relationships

EXAMPLES:

Die Farbe meiner Augen ist blau.  The color of my eyes is blue.	The genitive specifies that a quality –the color — “of my eyes” is being discussed.
Der Beruf des Mannes ist Arzt.  The profession of the man is doctor.	The genitive “of the man” indicates whose profession is being discussed.
Der Bruder meiner Freundin heißt Lars.  My girlfriend’s brother is named Lars.	The genitive “of my girlfriend” indicates whose brother is being discussed.

Susans Kusine kommt zu Besuch. Arnold Schwarzeneggars Heimatstadt ist Thal in Österreich. Hans‘ Auto ist in der Werkstatt.

Die Farbe von meinen Augen ist blau. Der Beruf von dem Mann ist Arzt. Der Bruder von meiner Freundin heißt Lars. Die Kusine von Susan kommt zu Besuch.

2) Object of a genitive preposition

(an)statt	instead of	jenseits	on the other side of
anlässlich	on the occasion of	kraft	by virtue of
anstelle	in place of	laut	according to
aufgrund	on the basis of	seitens	on the part of
außerhalb	outside of	trotz	despite, in spite of
bezüglich	with regard to	während	during
innerhalb	within	wegen	because of

EXAMPLES OF USAGE:

Er wohnt außerhalb der Stadt.  He lives outside the city.	“The city” is the object of the genitive prep.außerhalb.
Trotz des Regens spielen wir Fußball.  We’re playing soccer despite the rain.	“The rain” is the object of the genitive prep. trotz.
Aufgrund dieses Fehlers wurde ich entlassen.  I was fired on the basis of this mistake.	“This mistake” is the object of the genitive prep.aufgrund.

3) Object of a genitive verb or genitive construction

sich annehmen	to see to	sich enthalten	to refrain from
sich bedienen	to make use of	gedenken	to think of
bedürfen	to be in need of	sich rühmen	to boast of
sich bemächtigen	to take control of	sich vergewissern	to make certain of

EXAMPLES OF USAGE:

Er bedient sich einer Metapher.  He makes use of a metaphor.	“A metaphor” is the genitive obj. of the verb sich bedienen.
Hartholzmöbel bedürfen einer besondern Pflege. Hard wood furniture is in need of special care.	“Special care” is the genitive obj. of the verb bedürfen.

bedürftig	in need	sicher	certain
bewusst	conscious	verdächtig	suspicious
gewiß	certain	wert	worth
schuldig	guilty	würdig	worthy

EXAMPLES OF USAGE:

Sie ist des Mordes schuldig.  She is guilty of the murder.	“(Of) the murder” is the genitive object of the adjective “guilty”.
Es ist der Mühe nicht wert.  It is not worth the effort.	“The effort” is the genitive object of the adjective “worth”.
Anna war sich der Gefahr bewusst.  Anna was aware of the danger.	“(Of) the danger” is the genitive object of the adjective “aware”

4) Expressions of indefinite time

EXAMPLES:

Eines Tages besuchen wir München.  Someday we’ll visit Munich.	“Someday” is an expression of indefinite time.
Eines Abends war ich bei Freunden.  One evening I was at my friends’ place.	“One evening” is an expression of indefinite time.

Nouns in the GENITIVE CASE

Nouns				Personal Pronouns
masculine	feminine	neuter	plural
des Onkels dieses Onkels eines Onkels keines Onkels unseresOnkels	der Tante dieser Tante einer Tante keiner Tante unserer Tante	des Buches diesesBuches eines Buches keinesBuches unseresBuches	der Kinder dieser Kinder Kinder keiner Kinder unsererKinder	not commonly used in the genitive case

	[pun:] Geh nicht tief ins Wasser, weil es da tief ist.

	The care of one tooth is simple. But you have a couple more of them.

  The Genitive Case in English: English shows possession through the genitive case, which marks the noun in question with “-‘s” (or in a plural already ending in “-s” with just the apostrophe): “the horse’s mouth”; “the books’ covers.” One can also use a prepositional phrase with “of”: “the color of the car” (= “the car’s color”).   Forming the Genitive in German: Like the nominative, accusative, and dative cases, the genitive case is marked by pronouns, articles and adjective endings. In the genitive, there is no distinction between a “der-word” and an “ein-word.”¹ As a rule, one-syllable nouns take an “-es” in the masculine or neuter (des Mannes), although colloquial speech will sometime add just -s. Multi-syllabic ones take just “-s”:(des Computers):  

Masculine	Feminine	Neuter	Plural
des roten Stuhles	der neuen Lampe	des alten Buches	der roten Stühle
roten Stuhles	neuer Lampe	alten Buches	alter Bücher

Note that the possessive adjectives (mein, dein, sein, ihr, etc.) are not genitive in and of themselves. Nor is the interrogative wessen (= “whose”). As in the accusative and dative cases, the so-called weak masculine nouns take an “-n” or “-en” in the genitive. For example:  

nom. acc. dat. gen.	der Mensch den Menschen dem Menschen des Menschen [human]	der Nachbar den Nachbarn dem Nachbarn des Nachbarn [neighbor]	der Herr den Herrn dem Herrn des Herrn [lord; gentleman]	der Held den Helden dem Helden des Helden [hero]
nom. acc. dat. gen.	der Bote den Boten dem Boten des Boten [messenger]	der Kunde den Kunden dem Kunden des Kunden [customer]	der Junge den Jungen dem Jungen des Jungen [boy]	der Experte den Experten dem Experten des Experten [expert]
nom. acc. dat. gen.	der Jude den Juden dem Juden des Juden [Jew]	der Russe den Russen dem Russen des Russen [Russian]	der Kollege den Kollegen dem Kollegen des Kollegen [colleague]	der Riese den Riesen dem Riesen des Riesen [giant]

Other endings of weak nouns are “-ant,” “-arch,” “-ege,” “-ent,” “-ist,” “-oge,” “-om,” “-oph,” and “-ot.” Some examples:  

der Buddist [Buddhist]	der Katholik [Catholic]	der Protestant [Protestant]	der Pilot [pilot]
der Student [student]	der Komödiant [comedian]	der Astronom [astronomer]	der Patriarch [patriarch]
der Philosoph [philosopher]	der Fotograf [photographer]	der Enthusiast [enthusiast]	der Anthropologe [anthropologist]

Again: note that all of these nouns are masculine. Furthermore, their plural forms are the same as their accusative, dative, and genitive singular forms: e.g., den Studenten, dem Studenten, des Studenten; [plural:] die Studenten, den Studenten, der Studenten.(“Herr” is an exception: den Herrn, dem Herrn, des Herrn; [plural:] die Herren, den Herren, der Herren). Typically, dictionaries identify weak nouns by giving not only the plural but also the weak ending: “der Bauer (-n, -n) farmer, peasant.” The first ending that is cited is that of the genitive case. With weak nouns the accusative and the dative are usually identical with the genitive – but not always. A few weak nouns add “-ns,” for example:  

nom. acc. dat. gen.

der Glaube den Glauben dem Glauben des Glaubens [belief]

der Wille den Willen dem Willen des Willens [will]

der Gedanke den Gedanken dem Gedanken des Gedankens [thought]

der Name den Namen dem Namen des Namens [name]

One neuter noun is also weak in the dative and takes an “-ens” in the genitive:  

nom. acc. dat. gen.

das Herz das Herz dem Herzen des Herzens [heart]

  While the Latin accusative and dative forms of Jesus Christus (Jesum Christum, Jeso Christo) are not used in modern German, the genitive is: Jesu Christi. The genitive personal pronouns are rare nowadays, but they do exist (some further examples of their use can be found below):  

meiner = (of) me	unser = (of) us
deiner = (of) you	eurer = (of) y’all
	Ihrer = (of) you
seiner = (of) him ihrer = (of) her seiner  = (of) it	ihrer = (of) them

The demonstrative pronoun, on the other hand, is commonly employed:  

dessen = (of) him/it (masc.) derer = (of) her/it (fem.) dessen  = (of) it (neut.)

derer = (of) them

 

Wir danken im Namen derer, die in Nöte geraten sind.	We give thanks in the name of those who have come into hardship.
Meine Brüder und deren Kinder sind schon angekommen.	My brothers and their children have already arrived.

In ambiguous situations, the demonstrative possessive pronoun points to the nearest preceding (i.e. the latter) noun:  

Pauls Sohn und dessen Freunde haben Hunger.	Paul’s son and (Paul’s) son’s friends are hungry.
	[not: Paul’s son and (Paul’s) friends are hungry].

When such a pronoun depends on a preceding noun, desselben or derselben can be employed:  

Das Mikroskop, Theorie und Anwendung desselben.	The Microscope: its Theory and Use [book title]
Die meisten Glaubenslehrer verteidigen ihre Sätze nicht, weil sie von der Wahrheit derselben überzeugt sind, sondern weil sie diese Wahrheit einmal behauptet haben.	Most doctrinal theologians defend their propositions, not because they are convinced of the truth of them, but because they have at one point asserted that truth. [aphorism by G. C. Lichtenberg]

Further pronoun examples can be found below.

	[There is room in this subway car for] 2 bicycles. No bringing [a bike] along when this car is traveling at the front of the train.

Using the Genitive Case in German: Germans will often assert that the genitive is disappearing from the language. It is certainly used less than one or two centuries ago, but it still occupies an important position. Primarily, the genitive designates a relationship between two nouns in which one of them belongs to the other. The former can be in any case, but the latter is in the genitive:  

Was ist die Telefonnummer deiner schönen Kusine?	What is your beautiful cousin’s phone number?
Sie hat den Brief ihres Vaters gar nicht gesehen.	She never saw her father’s letter.
Das Bild deiner Frau ist besonders gut.	Your wife’s picture is particularly good.
Der Motor dieses Autos ist viel zu klein.	This car’s engine is much too small.
Die größte Liebe aller deutschen Männer ist Fußball.	The greatest love of all German men is soccer.
Das Dach des Hauses war unbeschädigt.	The roof of the house was undamaged.

 

	Success is the sum of correct decisions

  Note that the genitive noun comes second. The opposite sounds either archaic or poetic:  

“Das also war des Pudels Kern!” [Goethes Faust]

So that was the poodle’s core!

Proper names in the genitive do precede the noun, however. If the name already ends in “-s” or “-z,” then an apostrophe is added:²  

Was hast du mit Roberts altem Computer gemacht?	What did you do with Robert’s old computer?
Veronikas neuer Freund ist schön.	Veronika’s new boyfriend is handsome.
Heinz’ Hut ist wirklich hässlich.	Heinz’s hat is really ugly.

  In colloquial speech Germans often use the preposition von (with the dative, of course) instead of the genitive:  

Ist das der Freund von deinem Bruder?	Is that your brother’s friend?
Wir suchen das Haus von seiner Mutter.	We’re looking for his mother’s house.

 

The Dative is the Death of the Genitive. A Guide through the Labyrinth of the German Language [book by Bastian Sick] This construction with “von” is always used if there is no article to mark the genitive:   Er ist ein Freund von mir. He’s a friend of mine. Das Abstellen von Farhrädern ist verboten. The parking of bicycles is forbidden. Uneducated Germans sometimes use the dative and a possessive adjective to create a genitive effect: Bist du dem Mann seine Frau?  Are you the man’s wife? The genitive is used to indicate an indefinite day or part of the day:   Eines Tages sollten wir das machen. Some day we ought do that. Eines Morgens hat er vergessen, sich die Schuhe anzuziehen. One morning he forgot to put his shoes on. Eines Sonntags gehen wir in die Kirche. Some Sunday we’ll go to church. Although Nacht is feminine, it here – and only here – assumes an analogous structure: Sie isteines Nachts weggelaufen. She ran away one night. “I go to Block House [a chain of steak houses] only because of the salad.” “That’s what they all say.” Prepositions that take the genitive: A number of prepositions take a genitive object. The most common are statt and anstatt [instead of], trotz [in spite of],wegen [because of] and während [during]. In normal speech, German often use the dative after trotz and wegen.The grammar-police find that appalling, but in fact the dative is actually the older form.   Statt eines Regenmantels trägt er einen Schirm. Instead of a raincoat he carries an umbrella. Trotz der Kälte wollen wir schwimmen gehen. Despite the cold we want to go swimming. Wegen der Arbeit meines Vaters mussten wir oft umziehen. Because of my father’s work we often had to move. Wir machen alles des Kindes wegen. We’re doing everything on account of the child. Während des Sommers wohnt er bei seinen Großeltern. During the summer he lives with his grandparents. When just a masculine or neuter noun follows the preposition, there is no genitive “-s”:   Anstatt Fleisch isst sie Tofu. Instead of meat she eats tofu. Note also:   Er entschuldigte sich immer wieder wegen seines schlechten Deutsch. He apologized repeatedly on account of his bad German. Trotz ihres guten Französisch konnte sie nichts verstehen. In spite of her good French she couldn’t understand a thing. Less frequently used are außerhalb [outside of], innerhalb [inside of], oberhalb [above], unterhalb [beneath], diesseits [on this side of], and jenseits [on the other side of]:   Sie wohnen außerhalb der Stadt. They live outside the city. Nur ein Spieler darf innerhalb dieses Kreises stehen. Only one player is allowed to stand inside this circle. Oberhalb dieser Linie gibt es ein paar Kratzer. Above this line there are a couple of scratches. Die Leber sitzt unterhalb der Lunge. The liver is beneath the lung. Diesseits der Grenze spricht man Deutsch, aber jenseits spricht man Holländisch. On this side of the border German is spoken, but on the other side they speak Dutch.   The grand race of the lowest prices. George O. Curme’s Grammar of the German Language (New York: Macmillan, 1922) lists a total of 123 prepositions that take the genitive (p. 357), but most are very rare or confined to legal language. They include anlässlich [on the occasion of], angesichts [in the face of; in view of],infolge [as a result of; owing to], ungeachtet [despite; notwithstanding], etc. Genitive prepositions do not form “da-” compounds. Instead we use genitive demonstrative pronouns, getting structures like während dessen [in the meantime], statt dessen [instead of that], and trotz dessen [despite that] – written as one or two words. There is a special form of wegen:   Wir gehen seinetwegen zu Fuß. We’re going on foot on account of him (for his sake). Ich mache es ihretwegen. I’m doing it on account of her (for her sake). Kaufen Sie das nicht meinetwegen. Don’t buy that for my sake. Meinetwegen könnt ihr es verkaufen. As far as I’m concerned (for all I care), you can sell it. Verbs that take the genitive: Quite a few verbs once took a genitive object, but over time they have switched to the accusative. One example is vergessen, although the name of the flower Vergissmeinnicht (forget-me-not) remains. Some verbs officially still take the genitive, although many native speakers will use the accusative instead. It is with such formal – some would say stilted – German that you might encounter genitive pronouns:   Die Angst bemächtigte sich seiner. Fear seized him. Wir bedürfen Ihrer Hilfe. We require your assistance. Man muss unter 16 sein, um sich eines VCRs zu bedienen. You have to be under 16 to operate a VCR. Ich erfreue mich seiner Anwesenheit. I enjoy his presence. Wir harren ihrer Ankunft. We patiently await her arrival. Other genitive constructions: Some predicate adjectives are also associated with the genitive:   Er ist seiner Beliebtheit sehr gewiss. He’s very certain of his popularity. Ich bin mir dessen bewusst. I’m aware of that. Ach ich bin des Treibens müde! [aus Goethes “Wandrers Nachtlied”] Oh, I’m weary of this restless activity Sie ist des Mordes schuldig. She is guilty of murder. Er ist ihrer nicht wert. He’s not worthy of her. Certain noun phrases in the genitive act like prepositional phrases:   Er fährt immer erster Klasse. He always travels first class. Sie ist meine Cousine ersten Grades. She’s my first cousin. Wir sind heute guter Laune. We’re in a good mood today Sie geht guten Mutes nach Hause. She goes home in good spirits. Er arbeitet festen Glaubens dafür. He works for that with a firm faith. Meines Erachtens ist das nicht nötig. In my opinion that’s not necessary. Meines Wissens ist nichts übrig geblieben. As far as I know, nothing was left over. Sie behauptet das allen Ernstes. She claims that in all seriousness Du bist heute guter Dinge. You’re in a cheerful mood today. Wir sind unverrichteter Dinge zurückgekehrt. We returned having accomplished nothing. Junk disposal of all kinds bulky refuse / plastic, synthetics and scrap metal /clearing out of cellars, attics, and apartments / demolition work / moving service, mini-transport / free inspection / short notice possible Painting jobs. Fast, clean, and reasonably priced.   1 The “ein-words” are ein, kein, and the possessive pronouns: mein, dein, sein, ihr, unser, euer, Ihr, ihr. The so-called “der-words” are the articles der, die, das; dies-, jed-, jen-, manch-, solch-, welch-. Increasingly, Germans are putting apostrophes onto all names, especially in commercial enterprises. This option is unavailable to non-native speakers. Fränky’s Flowers.