German Relative Clauses

Mastering relative clauses is a pivotal step toward fluency in German, transforming simple statements into rich, descriptive sentences. These clauses allow you to add essential details about people, things, and ideas seamlessly. Unlike English, German relative clauses require careful attention to pronoun declension and a strict, non-negotiable sentence structure that you will learn to apply confidently.

What Is a Relative Clause?

A relative clause is a dependent clause that provides more information about a noun in the main clause. The noun it describes is called the antecedent. In English, we use pronouns like "who," "which," or "that." In German, the most common relative pronouns are the declined forms of the definite article: der, die, das, and their plural form die. The key rule is this: the relative pronoun must match the gender and number of its antecedent, but its case is determined by its function within the relative clause itself.

For example:

• Main Clause: Ich lese das Buch. (I am reading the book.)
• Antecedent: das Buch (neuter, accusative case in main clause)
• Relative Clause: Das Buch, das auf dem Tisch liegt, ist interessant. (The book that is lying on the table is interesting.)

Here, "das Buch" is neuter singular. In the relative clause, the pronoun "das" is the subject ("that...is lying"), requiring the nominative case.

The Declension of Relative Pronouns

This table is your essential tool. The relative pronoun changes form based on gender (masculine, feminine, neuter, plural) and the four grammatical cases.

Let's see this in action with different cases:

• Accusative: Der Mann, den ich kenne, ist freundlich. (The man whom I know is friendly.) "Mann" is masculine. In the clause, the man is the direct object ("I know"), so we use the accusative "den."
• Dative: Die Frau, der ich helfe, ist meine Nachbarin. (The woman whom I am helping is my neighbor.) "Frau" is feminine. Helping requires the dative case ("to whom I help"), so we use "der."
• Genitive: Das ist der Autor, dessen Buch ich liebe. (That is the author whose book I love.) Here, we show possession using the genitive forms "dessen" (masculine/neuter) or "deren" (feminine/plural).

The Verb-Final Position Rule

This is a non-negotiable structural rule in German. In a main clause, the conjugated verb is typically in the second position. However, in a relative clause, the conjugated verb must be placed at the very end of the clause. If you use a compound tense like the perfect, the auxiliary verb (haben/sein) goes to the end, making the participle second-to-last. This creates the characteristic German "bracket" structure within the clause.

• Main Clause (Verb 2nd): Ich kaufe einen Computer.
• Relative Clause (Verb Final): Ich kaufe einen Computer, der sehr schnell ist. (...that is very fast.)
• With Perfect Tense: Das ist das Auto, das er gekauft hat. (That is the car that he has bought.)

The Special Relative Pronouns: was and wo

The pronouns der/die/das refer to specific nouns. However, you must use was (what/that) as the relative pronoun in two specific situations:

1. When the antecedent is an indefinite pronoun like alles (everything), etwas (something), nichts (nothing), or vieles (much).

• Alles, was du sagst, ist wichtig. (Everything that you say is important.)

1. When the antecedent is a whole clause or idea.

• Er hat den Test bestanden, was mich sehr freut. (He passed the test, which pleases me very much.)

The pronoun wo (where/which) can be used informally as a relative pronoun replacing a preposition + "which" (e.g., in which, about which), especially when referring to places, situations, or abstract concepts. More formally, you would use preposition + der/die/das.

• Informal: Die Stadt, wo ich wohne, ist schön. (The city where I live is beautiful.)
• Formal: Die Stadt, in der ich wohne, ist schön. (The city in which I live is beautiful.)

Punctuation: The Essential Comma

German punctuation for relative clauses is simpler and more consistent than English. You must set off a relative clause with a comma. This comma is placed immediately after the antecedent in the main clause and again at the end of the relative clause, before the main clause continues. There is no optionality—it is always required.

• Correct: Der Film, den wir gesehen haben, war spannend.
• Incorrect: Der Film den wir gesehen haben war spannend.

Common Pitfalls

1. Mixing Up Antecedent Case and Relative Pronoun Case: The most frequent error is letting the case of the antecedent dictate the relative pronoun's case. Remember: gender/number come from the antecedent; case comes from the relative clause's internal grammar.

• Incorrect: Ich sehe den Mann, der ich helfe. (Using nominative "der" because "Mann" is subject of main clause? Wrong.)
• Correct: Ich sehe den Mann, dem ich helfe. ("I help the man" requires dative to the man: dem.)

1. Forgetting Verb-Final Position: Placing the verb in the second position of the relative clause is a direct carryover from English structure and is always incorrect in German.

• Incorrect: Das ist die App, die ist sehr nützlich.
• Correct: Das ist die App, die sehr nützlich ist.

1. Using der/die/das instead of was: Using the standard pronoun to refer to an entire idea or an indefinite pronoun creates a confusing sentence.

• Incorrect: Er ist pünktlich, das ich gut finde.
• Correct: Er ist pünktlich, was ich gut finde.

1. Omitting the Required Comma: While commas before "that" are sometimes optional in English, they are mandatory in German relative clauses. Omitting them is a grammatical error.

Summary

• German relative clauses use der, die, das (and plural die) as pronouns, which must match the antecedent's gender and number but take the case required within their own clause.
• The conjugated verb is always placed at the very end of a relative clause, a fundamental rule of German syntax.
• You must set off the relative clause with a comma from the main clause.
• Use the relative pronoun was when referring to indefinite pronouns like "alles" or an entire previous clause, not das.
• The pronoun wo can informally replace "preposition + which," though a formal construction with the correct declined article is also correct and often preferred in writing.