Diagnose recurring language errors

Help me diagnose recurring language errors.
Inputs: learner samples; target language; level.

1. Find recurring patterns instead of correcting everything.
2. explain rules and possible transfer effects.
3. design minimal-contrast practice and next-round checks.

Deliver: Snapshot, Error patterns, What is already solid, Two-week plan, How to check progress.
Clarify critical gaps, separate facts from assumptions, and do not invent data, citations or completed actions.

My material: [fill in here]

事前準備

Provide learner samples; target language; level.