How is Nail German different from apps like Duolingo or Babbel?

Duolingo and Babbel focus on general casual vocabulary matching. Nail German is an intensive examination drill engine built specifically for the grammar sections of official Goethe-Zertifikat and telc exams. It enforces strict CEFR rules, timed 15-minute mock simulations, and Leitner 3-streak active recall.

Which specific exams and CEFR levels are supported?

The curriculum spans all 6 CEFR levels (A1, A2, B1, B2, C1, C2) calibrated for Goethe-Zertifikat (A1–C2), telc Deutsch (A1–C1 Hochschule), and TestDaF.

Why is the Exam Simulator passing score set to exactly 60%?

Both Goethe-Institut and telc gGmbH officially require a minimum score of 60% (60/100 points or 9/15 items) to award an official language certificate. We match this exact Bestehensgrenze in our 15-minute exam simulator so you know your true test readiness.

Is the €19.99 Lifetime Pass truly a one-time payment with no subscription?

Yes. You pay €19.99 once and unlock permanent lifetime access to all 1,647 verified questions, all 6 CEFR levels (A1 to C2), unlimited exam simulations, and all future question updates with zero recurring charges or hidden fees.

Can I install this on my iPhone, Android, or laptop offline?

Yes! Nail German is built as a Progressive Web App (PWA). Open app.nailgerman.com on Safari or Chrome, tap Add to Home Screen, and the app installs as a full-screen standalone application that saves your local progress and works offline.

How does the 3-Box Ampel Leitner system work?

Every question is tracked individually in local storage. Missed questions drop to Box 1 (Rot) for immediate re-drilling. Questions advance to Box 2 (Gelb) upon 1 correct hit, and are only stamped Box 3 (Grün • Mastered) once you achieve 3 consecutive correct hits across mixed interval drills.

Should I use Nail German alone or alongside my current German course?

Nail German is engineered as the ultimate high-yield examination companion. While structured classroom courses (VHS, Goethe-Institut) and conversation apps provide listening and immersion, Nail German provides the high-frequency active recall drills needed to master examination grammar and clear the strict 60% Bestehensgrenze under timed pressure.

B1–B2 AdvancedGoethe B2, telc Deutsch B2, TestDaF

German Passive Voice: Formulas for Vorgangs- & Zustandspassiv

The passive voice shifts focus from who performed an action to the action itself. Vorgangspassiv (process) uses werden + Partizip II, while Zustandspassiv (resulting state) uses sein + Partizip II.

Mathematical Formula Blueprints

Vorgangspassiv (Process)

Describes an action taking place in real time.

Subject (Original Object)+WERDEN (conjugated)+Agent (von + Dat / durch + Akk)+PARTIZIP II (Ende)

Example:

"Das Auto wird von dem Mechaniker repariert."

Subject: Das Auto | Verb: wird | Agent: von dem Mechaniker | Partizip II: repariert

Passiv mit Modalverben

Modal verb is conjugated in Position 2; the passive infinitive goes to the end.

Subject+MODAL VERB (muss / kann / soll)+Mittelfeld+PARTIZIP II + WERDEN (Ende)

Example:

"Die Rechnung muss bis Freitag bezahlt werden."

Modal: muss | Passive Infinitive: bezahlt werden

Core Rules & Sentence Mechanics

Agent Marking: "von" vs. "durch"

Use "von + Dativ" for active human actors, institutions, or forces of nature. Use "durch + Akkusativ" for tools, means, or abstract causes.

Das Buch wurde von Goethe geschrieben. (Person) vs. Die Stadt wurde durch das Feuer zerstört. (Means/Cause).

Zustandspassiv (The Resulting State)

Formed with sein + Partizip II. It indicates that the action is already finished and describes the resulting condition.

Das Geschäft ist geöffnet. (State: It is open) vs. Das Geschäft wird geöffnet. (Action: Someone is opening it).

Reference Matrix & Master Table

Vorgangspassiv Tenses Matrix
Tense	Auxiliary Form	Structure	Example Sentence
Präsens	wird / werden	wird + Partizip II	Das Haus wird gebaut.
Präteritum	wurde / wurden	wurde + Partizip II	Das Haus wurde gebaut.
Perfekt	ist ... worden	ist + Partizip II + worden	Das Haus ist gebaut worden.
Plusquamperfekt	war ... worden	war + Partizip II + worden	Das Haus war gebaut worden.
Futur I	wird ... werden	wird + Partizip II + werden	Das Haus wird gebaut werden.
Mit Modalverb	muss ... werden	muss + Partizip II + werden	Das Haus muss gebaut werden.

Official Goethe & telc Exam Traps

The Perfekt Passive "worden" vs. "geworden" Trap

In passive Perfekt sentences, the past participle of werden is always "worden" (NEVER "geworden").

COMMON MISTAKE (0 Points)

Der Brief ist gestern abgeschickt geworden. (WRONG)

CORRECT STRUCTURE

Der Brief ist gestern abgeschickt worden. (CORRECT)

Examiner Rule: Only use "geworden" for natural changes of state (Er ist alt geworden). For passive, strictly use "worden".

Live Interactive Calibration

KNOWLEDGE CHECK

Test Your Understanding

Try these 2 interactive calibration questions for German Passive Voice: Formulas for Vorgangs- & Zustandspassiv.

Question 1 of 2Passiv Perfekt

Alle Dokumente sind bereits vom Notar geprüft [ ··· ].

Question 2 of 2Passiv Präteritum

Der Antrag [ ··· ] gestern noch vor Fristablauf eingereicht.

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