Spanish · Chapter 9 · Lesson 9 · Grammar primer
Preterite vs imperfect: which one when
The single hardest grammar topic in Spanish for English speakers. Side-by-side examples, decision rules, and the cases that break the rules.
The lesson is a long-form read rather than a flashcard session. Open the primer below, work through it once, then come back and continue with the next lesson.
Read the primer