Add 13 new grammar notes with 1010 exercises from video extraction
Scraped a 4h Spanish fundamentals YouTube video (transcript + OCR on 14810 frames), extracted structured content across 52 chapters, and generated fill-in-the-blank quizzes for every grammar topic. - 13 new GrammarNote entries (articles, possessives, demonstratives, greetings, poder, al/del, prepositional pronouns, irregular yo, stem-changing, stressed possessives, present/future perfect, present indicative conjugation) - 1010 generated exercises across all 36 grammar notes (new + existing) - Fix tense guide parser to handle unnumbered *Usages* blocks - Rewrite 6 broken tense guide bodies (imperative, subj pluperfect, subj future) with numbered usage format - Bump courseDataVersion 5→6 with TenseGuide refresh on upgrade - Add docs/spanish-fundamentals/ with raw transcripts, polished notes, structured JSON, and exercise data Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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# 26. Past Tense of "Ser" and "Ir"
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> Source: [video](https://youtube.com/watch?v=YHDZSHCt1DE&t=6488s)
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`Ser` (to be) and `ir` (to go) share the **exact same** preterite forms: `fui, fuiste, fue, fuimos, fuisteis, fueron`. Context — especially the preposition `a` after the verb — tells them apart.
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## Key Rules
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- `Ser` and `ir` are **identical** in the preterite.
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- Tell them apart by context: if the preposition `a` follows (with or without an infinitive), the verb is `ir`.
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- `Ser` in the preterite is used for events that **specifically happened** (when, where, how events took place).
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- For describing what things or people **were like**, use the imperfect (`era`) — coming in a later chapter.
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## Conjugation / Pattern Tables
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### ser / ir — preterite (same forms)
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| Pronoun | Form | Meaning |
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|---|---|---|
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| yo | fui | I was / I went |
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| tú | fuiste | you were / you went |
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| él/ella | fue | he was / he went |
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| nosotros | fuimos | we were / we went |
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| vosotros | fuisteis | y'all were / y'all went |
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| ellos | fueron | they were / they went |
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## Examples
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| Spanish | English |
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|---|---|
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| Yo voy a la tienda. | I go to the store. (present, ir) |
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| Yo fui a la tienda. | I went to the store. (preterite, ir) |
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| Tú vas a hacer tu tarea. | You go to do your homework. (present, ir) |
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| Tú fuiste a hacer tu tarea. | You went to do your homework. (preterite, ir) |
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| Ella fue al concierto ayer. | She went to the concert yesterday. (ir) |
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| Fuimos a ver la fiesta. | We went to see the party. (ir) |
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| La película fue aburrida. | The movie was boring. (ser — event/judgment) |
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| Fue difícil hacer la prueba. | It was difficult to do the test. (ser) |
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| La fiesta fue en el club. | The party was in the club. (ser — event location) |
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## Notes & Gotchas
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- The classic test: look for the preposition `a` after the conjugation. `Fui a la tienda` = "I went"; `Fui doctor` = "I was a doctor."
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- `Fue` is one of the most common Spanish words — often translated as "it was."
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- `Fue` (preterite) vs `era` (imperfect): `La película fue aburrida` = "The movie was boring (as an event)." `La película era aburrida` = "The movie used to be / was [generally] boring." Use `fue` for completed events, `era` for descriptions of how things were.
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- No accents on `fui`, `fue`, `fuiste`, etc. — these forms are exceptions to the usual accent rules.
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