Participle I as adjective (der schreibende Mann)

What Partizip I does (in real life)

Partizip I is the German “-ing” form used like an adjective to describe someone/something by an ongoing activity (often happening at the same time).

• der telefonierende Bewerber = the applicant who is (currently) on the phone
• die lesende Frau = the woman who is reading

Think of it as a compact alternative to a relative clause with der/die/das … der gerade ….

How to build it: verb → -end

• Most verbs: Infinitiv + -d → -end
  schreiben → schreibend, lesen → lesend, sprechen → sprechend
• With sein: sein → seiend (rare at B1; you will hardly need it)

Key point: it behaves like an adjective (so it must be declined)

In front of a noun, Partizip I gets adjective endings. This is the part learners often miss:

• die recherchierende Kollegin (not: die recherchierend Kollegin)
• den telefonierenden Bewerber (Akkusativ masculine)

Declension shortcut: choose the ending from the article

You do not invent endings. You use normal adjective declension logic:

1. Find the case (Nominativ/Akkusativ/Dativ/Genitiv).
2. Look at the article (der/die/das; ein/eine; etc.).
3. Add the usual adjective ending to the participle.

Mini-patterns you will use a lot:

• der + …e: der wartende Kunde
• die + …e: die wartende Kundin
• das + …e: das wartende Team
• den (Akk. m.) + …en: Ich sehe den wartenden Kunden.
• dem (Dat. m./n.) + …en: Ich helfe dem wartenden Kunden.
• plural die + …en: die wartenden Kunden

Where to place extra information (adverbs, objects, “gerade”)

Partizip I can keep its “verb power” and take complements.

• ein gerade E-Mails schreibender Manager
• die sich über das Unternehmen informierende Person

Tip: If it becomes too long or hard to read, switch to a relative clause.

• Better than an overloaded noun phrase:
  die Person, die sich vor dem Gespräch über das Unternehmen informiert

Reflexive verbs: keep “sich” inside the participle phrase

With reflexive verbs, sich stays with the participle phrase (not separated).

• die sich informierende Person
• Akkusativ example: Ich spreche mit der sich informierenden Person.

Self-check: 4 questions before you commit to an answer

1. Do I mean an ongoing action? (≈ “-ing”, “currently”)
   If not, Partizip II or a normal adjective may fit better.
2. Is it before a noun?
   If yes: it must be declined.
3. What is the case?
   Especially after prepositions: mit (+Dativ), für (+Akkusativ), etc.
4. Did I add the correct ending?
   Quick spot check: der/die/das → -e, den/dem/die (plural) → -en (very often).

Common mistakes (and how to fix them)

• Missing ending: die telefonierend Person → die telefonierende Person
• Wrong case ending: Ich sehe den telefonierende Bewerber. → … den telefonierenden Bewerber.
• Using it when it gets too long:
  Use a relative clause when the participle phrase becomes heavy.