1. Not answering the prompt exactly
The most penalising mistake: writing a nice text that answers off-topic. Each task has a precise prompt (inform, narrate, argue, compare two viewpoints). If you don't address it, the score drops, even with correct French.
The right reflex: underline the key words of the prompt and check, at the end, that every required element is present.
2. Ignoring the required word count
Each task imposes a word range. Too short = undeveloped ideas; too long = out of format and wasted time. Both are penalised.
3. Writing without structure
A text with no plan is hard to follow and caps your score. Each task benefits from a clear structure: introduction, organised development, conclusion. Especially for task 3 (argumentation), where a real, reasoned stance is expected.
The right reflex: use logical connectors (first, then, however, therefore…) to make your reasoning visible.
4. Weak vocabulary and recurring errors
- Repetitions ("thing", "good", "there is") → vary, show the range of your vocabulary.
- Agreements and conjugation: basic errors (subject-verb agreement, past participles) are quickly noticed.
- Punctuation and register: match the tone to the task (formal for an official letter).
Fixing your mistakes effectively
You don't improve by writing without feedback. The most effective way is to get correction on the official criteria (prompt compliance, coherence, vocabulary, grammar) to see exactly where you lose points.