A1/A2 sentence structure word order syntax perfekt past tense questions verbs grammar
Sentence Slots
Build correct German sentences — one reel at a time.
Sentence Slots is a five-reel slot machine where each reel is one position in a German sentence — subject, verb, object, adverbial, ending. Pull the lever, watch the words land left to right, and win double your wager when the five reels form a grammatically correct German sentence. Between spins you can flick reels by hand and hit Check to test combinations risk-free, which is where the real learning happens.
The format trains German sentence structure through pattern recognition under low-stakes pressure instead of conscious rule memorisation. Wins and losses give immediate visual feedback (green = correct, red = wrong), and the left-to-right reveal mirrors the natural flow of a German sentence, reinforcing word order one slot at a time. Because the vocabulary pool is intentionally narrow and recurring, learners can focus on structure — the kind of high-volume contextual exposure that cognitive science associates with implicit grammar learning.
It teaches German sentence structure for six A1–A2 patterns: Perfekt with haben (Der Mann hat die Pizza gegessen), Perfekt with sein (Die Frau ist zum Arzt gefahren), modal verbs (Das Kind kann das Essen bestellen), W-questions (Warum isst der Mann mit meiner Tante?), yes/no questions (Schläft die Frau in der Küche?) and yes/no questions with modals (Muss der Hund im Haus schlafen?). Each reel is one slot in the sentence — subject/question word, verb, object, adverbial, ending — so word order is built into the mechanic.
Every word in every reel position is hand-picked, and a spin only counts as a win if the exact combination matches one of the pre-defined valid sentences. Wrong word order, wrong verb form, wrong auxiliary — all losses. You see green for correct sentences and red for broken ones, and after enough spins your brain starts predicting which combinations will win before the reels even stop. That's pattern recognition doing the work of a grammar table.
Between spins you can manually flick any reel up or down with a swipe or mouse drag to scroll through the words in that position. Once all five reels have settled, a Check button appears — tap it to see whether your hand-built sentence is grammatically valid, without affecting your purse. It's the low-stakes sandbox where most of the actual learning happens: you start hypothesising, testing, and quietly figuring out the rules of German word order on your own.
Two reasons. First, the reels stop one at a time from left to right, which mirrors the way a German sentence actually unfolds — subject, then verb in second position, then object, then adverbial, then ending. Your brain is being trained to expect the structure in the right order. Second, the wager mechanic creates just enough stakes to keep attention high without panic, which is the sweet spot for pattern learning.
The free version covers three sentence types — Perfekt mit haben, W-questions and yes/no questions — with around 370 valid sentence combinations. It's a complete, fully playable introduction. The pro version unlocks all six sentence types, adding modal verbs, Perfekt mit sein and yes/no questions with modals, expanding the valid sentence space to over 1,500 combinations. More variety, longer replayability, and a much broader slice of A1–A2 grammar.
A1 and A2. The vocabulary is deliberately narrow (a recurring cast of subjects, verbs, objects and places) so learners can focus on structure rather than new words. Absolute beginners will find the free version useful for getting their first taste of how German sentences are built; A2 learners get the most out of the pro version, which exposes them to modal verbs and Perfekt mit sein in real sentence contexts.