(multiple choice: “Which conditional describes an impossible past?”) Stage 2 – Controlled production (gap-fills with tense clues) Stage 3 – Manipulation (sentence combining: “She didn’t set an alarm. She overslept.” → third conditional) Stage 4 – Free production (role-play: “You are a time traveler. Change one event in history and explain the results.”)
| Pitfall | Example error | Exercise antidote | |---------|---------------|--------------------| | Future in if-clause | “If it will rain, I will stay” | Transform “when/if” sentences; contrast with “when” clauses | | Double would | “If I would be rich, I would travel” | Error correction + contrast with first conditional | | Tense backshift neglect | “If I knew yesterday…” | Time-adverb forced choice: “yesterday” forces past perfect | | Mixed time confusion | “If I had studied, I would be rich” (correct but learner thinks it’s wrong) | Explicit labeling exercises: “Past condition → Present result” | | Overuse of zero conditional | Using zero for one-off future possibilities | Context classification: “Which type fits this real situation?” | A deep essay on exercises must propose a pedagogical sequence. The optimal conditional exercise curriculum follows four stages:
