Fill coverage gaps in chapters 1-11

Audited each chapter file against actual LLPSI Familia Romana content
using parallel reviewers (Claude general-purpose subagents, codex, gemini).
Each chapter gained missing vocabulary, grammar points, common-error
patterns, and exercise types. ~190 lines added across 11 files.

Highlights per chapter:
- c1: geography proper nouns, -us fem. exceptions, num-question answer pattern
- c2: -er paradigm contrast (puer/vir/liber), -que rewrite drill
- c3: interrog. vs. relative quem, neque rewrite
- c4: nullus/UNUS NAUTA, -ius vocative, eius/suus contrast
- c5: relative pron. (nom.), suus agreement, -ae ambiguity
- c6: passus 4th-decl preview, mille/milia, autem postpositive
- c7: cui drill, plenus + gen., quod (because/relative/interrog.) trap
- c8: hic/ille discourse force, UNUS NAUTA class, quantus/quot trap
- c9: stem recovery from gen., ipse emphasis target, sub + abl. for location
- c10: fera vs. ferus, abesse/adesse/ire infinitives, quia/quod synonymy
- c11: full posse paradigm, dat. of reference (mihi dolet), gaudere syntax

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

llpsi-c11.md

@@ -25,12 +25,12 @@ Topic argument supported (e.g. `/llpsi-c11 body`, `/llpsi-c11 acc-inf`, `/llpsi-
 - *auris, auris* f. (ear — i-stem)
 
 **Body parts — others**:
-- *bracchium -ī* n. (arm); *membrum -ī* n. (limb); *capillus -ī* m. (hair); *gena -ae* f. (cheek); *cerebrum -ī* n. (brain); *labrum -ī* n. (lip); *lingua -ae* f. (tongue); *vēna -ae* f. (vein).
+- *bracchium -ī* n. (arm); *membrum -ī* n. (limb); *capillus -ī* m. (a single hair) — usually pl. *capillī, -ōrum* m. (hair, of the head); *gena -ae* f. (cheek); *cerebrum -ī* n. (brain); *labrum -ī* n. (lip); *lingua -ae* f. (tongue); *vēna -ae* f. (vein).
 - *manus, manūs* f. (hand) — **4th-declension** noun, your first one! gen. sg. *-ūs*, pl. *manūs* etc.
 
 **Plural noun**: *viscera, -um* n.pl. (internal organs).
 
-**Other nouns**: *medicus -ī* m. (doctor); *pōculum -ī* n. (cup); *culter, cultrī* m. (knife — drops -e- like *puer/pueri*).
+**Other nouns**: *medicus -ī* m. (doctor); *pōculum -ī* n. (cup); *pōmum -ī* n. (fruit — general term); *culter, cultrī* m. (knife — drops -e- like *puer/pueri*).
 
 **Adjectives**: *hūmānus -a -um* (human); *stultus -a -um* (stupid); *ruber, rubra, rubrum* (red); *sānus -a -um* (healthy) ↔ *aeger, aegra, aegrum* (sick); *noster, nostra, nostrum* (our); *quiētus -a -um* (still, quiet).
 
@@ -55,7 +55,7 @@ Topic argument supported (e.g. `/llpsi-c11 body`, `/llpsi-c11 acc-inf`, `/llpsi-
 - *gaudēre* + acc.+inf. (to rejoice, 2nd): *gaudet, gaudent.*
 - *dētergēre* (to wipe off, 2nd).
 
-**Irregular**: ***posse*** full paradigm — *est, sunt → potest, possunt*; infinitive *posse*.
+**Irregular**: ***posse*** full present indicative — *possum, potes, potest, possumus, potestis, possunt*; infinitive *posse*. (Pattern: *pot-* + forms of *esse*; *pot-s-* → *pos-s-*.)
 - *Aemilia nōn putat medicum puerum sānāre **posse**.* (inf.)
 
 **Particles**: *modo* (only, just); *super* + acc. (above); *īnfrā* + acc. (below); *dē* + abl. (down from, about); *atque* (= *et*, often before vowels); *nec* (= *neque*); *bene* ↔ *male*; *ergō* (therefore).
@@ -97,7 +97,8 @@ Topic argument supported (e.g. `/llpsi-c11 body`, `/llpsi-c11 acc-inf`, `/llpsi-
    - **necesse est**: *Puerum dormīre necesse est.*
 
 4. ***posse*** — full present paradigm now:
-   - 3sg *potest*, 3pl *possunt*; inf. *posse*.
+   - sg.: *possum, potes, potest*; pl.: *possumus, potestis, possunt*; inf. *posse*.
+   - Built on *pot-* + *esse* (with *t* → *s* before *s*: *pot-sum → possum*).
    - *Aemilia putat medicum sānāre nōn posse.*
 
 5. ***iubēre* + acc.+inf.** — orders are expressed indirectly: *Iūlius servum medicum arcessere iubet.* "Julius orders the slave to summon the doctor." Distinct from direct imperative (*Arcesse medicum!*).
@@ -115,6 +116,13 @@ Topic argument supported (e.g. `/llpsi-c11 body`, `/llpsi-c11 acc-inf`, `/llpsi-
 
 10. **Adverbs *bene/male***: from *bonus/malus*. *bene videt, male audit.*
 
+11. **Dative of reference with *dolēre***: *Pēs **mihi** dolet* ("the foot hurts to me" = "my foot hurts"). Idiomatic alternative to possessive *pēs meus dolet*. Same with *caput, venter*: *Caput Quīntō dolet.*
+
+12. ***gaudēre* syntax** — accepts both:
+   - *quod* + clause: *Aemilia gaudet **quod** fīlius vīvit.*
+   - acc.+inf.: *Aemilia fīlium **vīvere** gaudet.*
+   Drill the contrast — same meaning, different construction.
+
 ## Common error patterns
 
 - **3rd-decl. neuter wrong stem**: *corpus → genitive corpusis* — wrong; stem changes: *corporis*. Same *pectoris, ōris, crūris, capitis, cordis*. Always learn the gen. with the noun.
@@ -128,6 +136,8 @@ Topic argument supported (e.g. `/llpsi-c11 body`, `/llpsi-c11 acc-inf`, `/llpsi-
 - ***manus* declined as 2nd-decl.**: *manī* (gen.) — wrong; 4th-decl. gen. sg. is *manūs* (with macron). Don't confuse with nom. pl. *manūs* (also -ūs, distinguished by context).
 - ***ōs* (mouth, n.) confused with *os* (bone, n.)**: same nominative spelling without macrons; gen. *ōris* (mouth) vs. *ossis* (bone).
 - ***atque* / *nec***: *atque* = *et* (often before vowels); *nec* = *neque*. Don't translate as a different word.
+- **Gender of *sanguis***: students assume neuter (inanimate substance) — wrong; *sanguis* is **masculine**: *sanguis ruber*, not *sanguis rubrum*.
+- ***venter* (m. sg., belly) vs. *viscera* (n. pl., internal organs)**: confusing gender/number. *venter dolet* (m. sg.); *viscera dolent* (n. pl.).
 
 ## Exercise menu
 
@@ -142,6 +152,9 @@ Topic argument supported (e.g. `/llpsi-c11 body`, `/llpsi-c11 acc-inf`, `/llpsi-
 9. **PENSVM A fill**: "Membra corpor- hūmānī sunt duo bracchia et duo crūr-." → *corporis, crūra.* "In capit- sunt duae aur- et ūn- ōs." → *capite, aurēs, ūnum.*
 10. **Spot the error**: "Syra putat Quīntus mortuus esse." → *Quīntum mortuum* (both acc.). "Aemilia nōn putat medicum sānāre potest." → *posse* (inf.). "In mare sunt multī piscēs." → *In marī.*
 11. **PENSVM C Q&A**: "Cūr Syra Quīntum mortuum esse putat?" → *Quia Quīntum spīrāre nōn audit.* "Quid videt medicus in ōre Quīntī?" → *Dentem nigrum / aegrum (videt).* "Unde medicus arcessitur?" → *(Ex oppidō / ē) Tusculō (arcessitur).*
+12. **Direct → indirect transformation**: convert quoted speech to acc.+inf. *Quīntus: "Pēs meus dolet!"* → *Quīntus dīcit pedem suum dolēre.* *Syra: "Quīntus mortuus est."* → *Syra Quīntum mortuum esse dīcit / putat.* *Aemilia: "Fīlius vīvit!"* → *Aemilia fīlium vīvere gaudet.*
+13. **Adverb formation *bonus → bene*, *malus → male***: pair with verbs. "Quīntus ___ videt sed ___ audit." (good/poor) → *bene, male.* "Aemilia cantat ___." → *bene.* Then reverse: "Adv. of *malus*?" → *male.*
+14. **Body-part touch/point drill** (TPR-style imperatives): *Tange genam tuam! Mōnstrā nāsum! Aperī ōs! Claude oculōs!* Student responds by miming + repeats. Then: "What did I say?" → translates back.
 
 ## Session start