Cargando protección...
- Quick glossary
- Why this matters
- Lesson map
- Micro 1 — Understanding past perfect continuous
- Micro 2 — Ongoing problems before a crash
- Micro 3 — Explaining causes and duration
- Micro 4 — Past perfect continuous vs past simple
- Common mistakes (advanced context)
- Final practice: "Who Caused the Outage?"
- Mini-Quiz
- What you can do now