Ein und eine

In English, we choose to use either a or an depending on the following word. Similarly, German switches between ein or eine depending on the grammatical gender of the noun being referred to.

GenderThe NounA Noun
der Ort
the place
ein Ort
a place
die Welt
the world
eine Welt
a world
das Eichhörnchen
the squirrel
ein Eichhörnchen
a squirrel

Note that the masculine and neuter forms of ein are the same, unlike with der and das!

Der Ozean ist mein Ozean!
The ocean is my ocean!

There are several other "ein-style" words that follow the same gendered inflection pattern as ein/eine. Keep their different meanings in mind!

der Ozean
the ocean
mein Ozean
my ocean
dein Ozean
your ocean
sein Ozean
his ocean
kein Ozean
no ocean
die Krabbe
the crab
meine Krabbe
my crab
deine Krabbe
your crab
seine Krabbe
his crab
keine Krabbe
no crab
das Problem
the problem
mein Problem
my problem
dein Problem
your problem
sein Problem
his problem
kein Problem
no problem
Deine Plurale:

It makes no sense to say 'eine Plurale' (an plurals), but words like meine or keine can be used for plurals. Like with die Plurale, they follow the feminine form, regardless of the noun's original gender.

Compound words:

When dealing with compound words, the last word within the compound word would define the gender of the noun. For instance the noun Spiegelei includes the words Spiegel (masculine) and Ei (neuter), so in this case the ending-word of Ei would be definining gender for Spiegelei.

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