Tips and notes
In English, the words "he" and "I" can be used as subjects (the ones doing the action in
a sentence), and they change to "him" and "me" when they are objects (the ones the
action is applied to). For example, we say "He likes me" and "I like him." This is exactly
the notion of a "grammatical case:" the same word changes its form depending on its
relationship to the verb. In English, only pronouns have cases, but in German most
words other than verbs have cases: nouns, pronouns, determiners, adjectives, etc.
Understanding the four German cases is one of the biggest hurdles in learning the
language. The good news is that most words change very predictably so you only have
to memorize a small set of rules. We'll see more about cases later, but for now you just
need to understand the difference between the two simplest cases: nominative and
accusative.
The subject of a sentence (the one doing the action) is in the
nominative case. So when we say "Die Frau spielt" (the
woman plays), "Frau" is in the nominative.
The accusative object is the thing or person that is directly
receiving the action. For example, in "Der Lehrer sieht den
Ball" (the teacher sees the ball), "Lehrer" is the nominative
subject and "Ball" is the accusative object. Notice that the
articles for accusative objects are not the same as the
articles in the nominative case: "the" is "der" in the
nominative case and "den" in the accusative. The following
table shows how the articles change based on these two
cases:
Case
Masculine
Feminine
Neuter
Plural
Nominative
der
die
das
die
Accusative
den
die
das
die
Case
Masculine
Feminine
Neuter
Nominative
ein
eine
ein
Accusative
einen
eine
ein
The fact that most words in German are affected by the case explains why
the sentence order is more flexible than in English. For example, you can
say "Das Mdchen hat den Apfel" (the girl has the apple) or "Den Apfel hat
das Mdchen." In both cases, "den Apfel" (the apple) is the accusative
object, and "das Mdchen" is the nominative subject.
Conjugations of the verb sein (to be)
The verb "sein" (to be) is irregular, and its conjugations simply need to be memorized:
German
English
ich bin
I am
du bist
you (singular informal) are
er/sie/es ist
he/she/it is
wir sind
we are
ihr seid
you (plural informal) are
sie sind
they are
Sie sind
you (formal) are