Add the Verbs tab, and stop Daily rounds repeating a preposition
The possessive and pronoun levels already build sentences with no
preposition in them - "Ich kenne ___ Mann", "Ich helfe ___ Mann" - where
the case is decided purely by the verb. Six verbs were doing that silently
across seven levels (sehen, kennen, lieben, hoeren as accusative, helfen as
dative, geben as both) and nothing in the app had ever taught or tested it.
The framing the whole section rests on: there is no accusative list to
learn. Accusative is the default for hundreds of transitive verbs, so you
learn the dative exceptions - the same shape as the preposition lists the
app already teaches.
39 verbs of data, in four groups:
- accusative foils, including the ones English makes feel dative
(fragen, anrufen, treffen, unterstuetzen, moegen)
- 12 dative verbs: helfen, danken, antworten, glauben, folgen, gratulieren,
vertrauen, verzeihen, begegnen, zuhoeren, raten, schaden
- 4 that flip subject and object against English: gefallen, schmecken,
fehlen, gehoeren
- 8 two-object verbs, all covered by one rule: person Dativ, thing Akkusativ
Six lessons plus Daily Practice: Welcher Fall? / Die Fallen / Gefallen & Co.
/ Dativ + Akkusativ / Im Satz / Alles gemischt. The tab sits second, right
after Prepositions, so case government is learned before the forms that
depend on it.
Near-synonyms that disagree are modelled as a `trap` link, and a test
asserts every trap points at a real verb taking the other case and that the
link is symmetric - so fragen/antworten, treffen/begegnen, anrufen/zuhoeren,
unterstuetzen/helfen and moegen/gefallen cannot drift apart.
The inverted verbs carry an explicit English reordering rule rather than a
literal gloss, so "Das Fenster gefaellt der Aerztin" renders as "The doctor
likes the window" and never "The window pleases the doctor". Tested.
Verb sentences are enumerated into corpus.txt like everything else, keyed on
verb x noun, which is what caught "I lend the teacher the bed" and "I
recommend the girl the cupboard" before they shipped - two-object verbs now
name the things that can actually be handed over, and the English uses the
"to the person" order.
167 tests pass.
Known gap: a handful of verbs take the genitive (gedenken, beduerfen,
beschuldigen). They are formal and rare, so the rule panel mentions them and
the app does not drill them.
Daily rounds could serve the same preposition twice, even back-to-back
Reported as "für" twice in a row in the Prepositions daily. Measured before
the fix: 14% of prep-daily rounds had a back-to-back repeat and 51% repeated
some preposition.
A Daily round mixes several lessons, and each one was handed its own
newState(). The anti-repeat memory therefore only spanned one lesson's slice
of the round, so level 8 drawing "für" and level 10 drawing "für" could not
see each other. drawBag also only avoided the previous item when the bag
refilled, not on every draw.
- newState(shared) lets several lesson states run off one memory, and the
Daily hands the same one to every lesson it mixes.
- drawBag now skips anything already used this cycle, and never repeats the
previous item, checked on every draw rather than only at a refill.
- Kontraktionen drew through a different bag ('contr') and so bypassed the
preposition memory entirely, letting "im" follow "in". It now consults and
records the shared memory.
- Adjective frames were chosen with a plain pick(), so a Daily could repeat
a whole carrier sentence. They are dealt from the shared memory too.
Rejected draws are put BACK into the bag rather than discarded. The first
version burned them, which skewed the Kontraktionen deal 1.5x toward the
forms whose preposition is not shared with a sibling form; reinsertion holds
the spread at 1.04x.
After: every Daily and every preposition-drilling level is at 0% for both
back-to-back and within-round repeats. Two cases remain non-zero and are
arithmetic rather than bugs - a round is 10 questions, so Wechsel im Kontext
(9 prepositions) must repeat one, and the Stark adjective level has exactly
one prepositional carrier frame. The adjective tab is held to frame variety
rather than preposition variety, since there the preposition is scenery and
the ending is the question.
Tests pin all of it: no Daily may repeat a preposition, no level may repeat
one back-to-back where it has a choice, and no Daily may repeat a carrier
sentence back-to-back.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017Uza6mhTpAvSwMQuFc4Cz8
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Claude Opus 5