Participles as adjectives
German has two participles, and BOTH can be used as adjectives in front of nouns. Partizip I is the -end form: take the infinitive and add -d: lachen → lachend (laughing), schlafen → schlafend (sleeping). It marks ongoing action — the noun is doing it right now. Partizip II is the past participle you already know from Perfekt and Passiv: gemacht, geöffnet, gelesen, angekommen. As an adjective, Partizip II marks completed action (transitive verbs → passive sense: 'has been done') or, with motion verbs, just 'arrived' / 'fallen'. Both participles decline like any adjective and take the same strong/weak/mixed endings from L28. Bonus: German loves extended attributes — long modifier phrases stuffed before the noun (der gestern in Berlin angekommene Brief), the famous compact German style for official writing.
Partizip I — formation and meaning
Take the infinitive, add -d: lachen → lachend, singen → singend, schlafen → schlafend, lesen → lesend, sprechen → sprechend, arbeiten → arbeitend. The Partizip I always describes an ongoing action being performed by the noun: das lachende Kind = the laughing child (a child who is laughing). die schlafende Katze = the sleeping cat. Sie ging singend nach Hause. = She went home singing. Note: as an attributive adjective in front of a noun, Partizip I gets the normal adjective endings. Used adverbially (after the verb), it stays uninflected — singend without ending. English '-ing' overlaps but isn't identical: don't translate every '-ing' as Partizip I. A running man = ein laufender Mann, but I am running = Ich laufe, NOT ich bin laufend.
Partizip II — formation and meaning
Same form you've used for Perfekt and Passiv: gemacht, gegessen, gelesen, geschrieben, geöffnet, angekommen, verloren. As an adjective, it has two main senses: (1) passive completed action with transitive verbs — the noun has had this done to it. die geöffnete Tür = the opened door (a door that has been opened). das gelesene Buch = the read / already-read book. die geschriebene Geschichte = the written story. (2) simple completed state with motion / change-of-state verbs (the sein-helper group). der angekommene Zug = the arrived train (the train that has arrived). die gefallenen Blätter = the fallen leaves. Like any adjective, Partizip II declines.
Endings — same system as L28
Both participles take ordinary adjective endings: strong (no article), weak (after der-words), mixed (after ein-words). das lachende Kind (weak), ein lachendes Kind (mixed), lachende Kinder (strong plural). der geöffnete Brief (weak), ein geöffneter Brief (mixed), geöffnete Briefe (strong plural). Mit der lächelnden Frau (weak f. dat. → -en). Trotz des angekommenen Pakets (weak m./n. gen. → -en). The endings are not new; what's new is that the stem is a participle.
Partizip I vs Partizip II — which one?
Quick test: is the noun doing the action (active) or receiving it (passive)? Partizip I = active and ongoing. Partizip II = passive (or perfective, for sein-verbs). Der schreibende Mann = the man who is writing. Der geschriebene Brief = the letter that has been written. Die kochende Suppe = the soup that is cooking. Die gekochte Suppe = the soup that has been cooked. das schlafende Kind = sleeping child (active, ongoing); das eingeschlafene Kind = the child who has fallen asleep (completed change of state). Pick by meaning, not by form.
Adverbial use — without endings
Both participles can sit OUTSIDE the noun phrase, used as adverbs. No ending then. Sie ging singend nach Hause. = She went home singing. Lachend kam er ins Zimmer. = Laughing, he came into the room. Er saß lesend am Tisch. = He sat at the table reading. With Partizip II, adverbial use is rarer but exists: Wir sind erschöpft angekommen. = We arrived exhausted. The general pattern: in front of a noun with an article → adjective with ending; standing alone → adverb with no ending.
Extended attributes — German's compact monster
Written/formal German loves to stack a whole phrase between an article and its noun. The structure: article + [modifier phrase + participle/adjective] + noun. der gestern in Berlin angekommene Brief = the letter that arrived yesterday in Berlin. die von ihm geschriebene Geschichte = the story written by him. das von der Lehrerin korrigierte Heft = the notebook corrected by the teacher. To unpack one, find the article (der, die, das), find the noun it points to (Brief, Geschichte, Heft), and read everything between as a relative clause: 'the letter that arrived yesterday in Berlin', 'the story that was written by him'. In speech, German usually breaks these into actual relative clauses; in writing (especially news, law, science), the extended attribute is everywhere. You don't need to produce them at B2; you DO need to recognize them when reading.
Tips for spotting and decoding
Visual cue: an article der/die/das followed by something OTHER than a noun (a participle or adjective with modifiers in front of it) — that's an extended attribute brewing. Read until you hit the noun, then mentally rewrap: 'the [noun] that [the modifiers] [participle]'. das von uns gestern gekaufte Buch = the book that we bought yesterday. die in der Stadt arbeitenden Frauen = the women (who are) working in the city. The participle right before the noun is the verb of your invisible relative clause. Practice: convert every extended attribute back into a normal der/die/das-relative clause.
