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5. Ser/Estar (Past Tense)
6. Core Irregular Verbs (Present & Past)
10. Stem-changing Verbs - Part 1
11. Stem-changing Verbs - Part 2
12. Imperfect vs. Preterite
13. Syntax: Objects Overview
14. Past Participles & Present Perfect
15. Irregular and Go-verbs (Present)
16. Verbs with Irregular Yo-forms (Past)
17. Direct Object Pronouns
18. Indirect Object Pronouns, Direct & Indirect Object Pronouns Together
21. Present & Past Progressive
22. Past Perfect & Infinitive Constructions