Gender and the nominative articles
German has three grammatical genders: masculine, feminine, and neuter. Every noun belongs to exactly one of them, and the gender controls the article (der / die / das / ein / eine). The gender often has nothing to do with biology — das Mädchen ('the girl') is neuter, die Sonne ('the sun') is feminine. The fix: never learn a noun without its article. Don't memorize Tisch — memorize der Tisch.
Definite articles — der, die, das
der = the (masculine): der Mann (the man), der Tisch (the table), der Tag (the day). die = the (feminine): die Frau (the woman), die Lampe (the lamp), die Schule (the school). das = the (neuter): das Kind (the child), das Haus (the house), das Buch (the book). Plural is always die, regardless of gender — we'll dig into plurals in lesson 5.
Indefinite articles — ein, eine
ein = a / one (masculine and neuter): ein Mann, ein Buch. eine = a / one (feminine): eine Frau, eine Lampe. Note: there is no plural indefinite article — German just drops it. Ich habe Bücher. = 'I have books.'
Helpful (but imperfect) gender clues
Some endings tip you off. Almost always feminine: -ung (die Zeitung = newspaper), -heit / -keit (die Freiheit = freedom), -schaft (die Freundschaft = friendship), -ei (die Bäckerei = bakery). Almost always neuter: -chen (das Mädchen = girl, das Häuschen = little house) and -lein — both are diminutive endings, always neuter. Often masculine: days, months, seasons (der Montag, der Sommer), and most one-syllable nouns ending in a consonant (der Tisch, der Stuhl).
Why it matters
Gender isn't decorative — it controls the rest of the sentence. Wrong article = wrong-sounding German. die Tisch sounds as off to a native ear as 'a sand' would in English. Worse, in later lessons gender drives the case endings on adjectives and pronouns. Front-load this work now: every flashcard for a noun should include the article.
Es ist / das ist
Das ist… = 'This is…' or 'That is…' (regardless of the noun's gender). Das ist ein Mann. Das ist eine Frau. Das ist ein Kind. All correct. Once a thing is introduced, you switch to er, sie, or es to refer back: Das ist ein Mann. Er ist nett. — 'That's a man. He is nice.'
