Most common mistakes in the B1 exam – from teachers' practice
In the B1 exam, candidates most often lose points not because they lack knowledge, but because of strategy: they neglect one part of the exam, leave out a point of the prompt in the writing task, or answer in the oral part with a single sentence. Among language mistakes, the ones that keep coming back are case endings (especially the genitive and instrumental), aspect in the past and future tense, numerals with nouns, and calques from the native language. The list below comes from the teaching practice of Pol-Langua teachers – without statistics, but with correct forms. A trial lesson will show which of these mistakes apply to you.
Strategic mistakes – the costliest of all
The biggest costs come from mistakes in preparation and behaviour at the exam, because a single one can ruin the whole result. We describe the pass rules for each part in the guide to the B1 exam.
| Mistake | Consequence | How to avoid it |
|---|---|---|
| Preparing only for your favourite part, e.g. grammar alone | one failed module means a failed exam, even with excellent results in the rest | check the result of each part separately in a practice test and work on the weakest one |
| Skimming the prompt | in writing – a missed point; in reading – an answer to a different question | underline the key words and number the points of the prompt |
| No time control | an unfinished text or the last tasks left unanswered | do practice tests with a watch; leave a difficult task for the end |
| Empty fields in closed tasks | an empty answer certainly earns no point | always mark the most likely option |
| A phone in your pocket in the exam room | bringing in devices or aids means the exam is interrupted and annulled | leave your phone in the cloakroom or in the place indicated by the Commission |
| The wrong identity document | the Commission checks your identity before the exam | check at the centre which document you must show and prepare it the day before |
| A letter or monologue learned by heart | the text does not fit the prompt and loses points for completing the task | learn phrases and patterns, not ready-made texts |
Grammar mistakes that come back most often
Most grammar mistakes at B1 concern cases after prepositions and verbs, aspect and numerals. Below are the ones that teachers correct in their students most often – in the grammar and writing modules and in the oral part.
| Mistake | Correct | Rule |
|---|---|---|
| Nie mam czas. | Nie mam czasu. | after a negation the object changes from the accusative to the genitive |
| Jestem nauczyciel. | Jestem nauczycielem. | być + noun = instrumental |
| Idę do sklep. | Idę do sklepu. | do + genitive |
| Mieszkam w Gdańsk. | Mieszkam w Gdańsku. | w + place = locative, also in names of cities |
| Mieszkam w Polsce od dwa lata. | Mieszkam w Polsce od dwóch lat. | od + genitive, also of a numeral |
| Dwa koledzy przyszli. | Dwaj koledzy przyszli. / Dwóch kolegów przyszło. | for men – masculine-personal forms of the numeral |
| Ci kobiety pracują tutaj. | Te kobiety pracują tutaj. | ci only for groups that include men |
| Jutro będę zrobić zakupy. | Jutro zrobię zakupy. | a perfective verb has only the simple future tense |
| Wczoraj czytałem tę książkę do końca. | Wczoraj przeczytałem tę książkę do końca. | a result, a completed action – perfective aspect |
| Ja podobam ten film. | Podoba mi się ten film. | the person who likes something stands in the dative |
| Przyjadę przez tydzień. | Przyjadę za tydzień. | za – after how much time; przez – for how long |
| Gdybym mam czas, pojadę. | Gdybym miał czas, pojechałbym. | after gdyby – a past-tense form, and the conditional mood in the second part |
We go through all these topics one by one in our overview of grammar for the B1 exam.
Mistakes in writing
In the writing module, what costs the most is not grammar but incomplete completion of the prompt and the wrong style. The mistakes we correct most often:
- A missed point of the prompt – the student writes a lot about one matter and forgets another. Solution: number the points and tick them off before handing in your work.
- Mixing styles – Szanowna Pani at the beginning and Buziaki at the end, or Cześć in an e-mail to an office.
- A lower-case letter in polite forms – in letters we write Pan, Pani, Państwo, Ty, Twój with a capital letter.
- No comma before a conjunction – before że, żeby, bo, ponieważ, który, kiedy, jeśli we put a comma: Myślę, że to dobry pomysł.
- One long paragraph – a text without division is hard to read and looks incoherent.
- Repetition – problem three times in one paragraph; use sytuacja, kłopot, sprawa instead.
- Spelling – mixing up ó / u, rz / ż, ch / h. Substitutions help: stół – stoły (ó, because it alternates with o), morze – morski (rz, because it alternates with r), mogę – może (ż, because it alternates with g).
The sample B1 letter with commentary shows these mistakes in a concrete e-mail, and you will find the rules of writing in our guide to writing in the B1 exam.
Mistakes in the oral part
In speaking, the most common mistake is saying too little, not speaking with errors. The Commission cannot assess skills that you do not show.
- An answer in one sentence – Tak, lubię sport. and silence. Add a reason, an example and a summary.
- Long silence instead of the phrase Muszę się chwilę zastanowić or a request to repeat the question.
- A learned monologue that does not answer the question – the examiner notices this and asks follow-up questions.
- Addressing the Commission as "ty" – we address the examiners as pan, pani.
- Switching to another language when you lack a word – it is better to describe the word in Polish: to taka rzecz, w której gotujemy zupę.
- Speaking too fast – candidates speed up from stress, and then they lose endings.
See how the oral part runs and how to build a good answer.
Calques from your native language
Some mistakes come from carrying over constructions from your native language. Each group of students has its own typical traps – below are a few examples that we meet most often in lessons.
| Native language | Mistake | Correct |
|---|---|---|
| Russian, Ukrainian | Dzwonię mamie. | Dzwonię do mamy. |
| Russian, Ukrainian | Zapytałem u kolegi. | Zapytałem kolegę. |
| Russian, Ukrainian | Przed egzaminem muszę zapomnieć te słowa (meaning "learn by heart"). | Przed egzaminem muszę zapamiętać te słowa. – in Polish zapomnieć means "to stop remembering" |
| English | Jestem trzydzieści lat. | Mam trzydzieści lat. |
| English | Zrobiłem decyzję. | Podjąłem decyzję. |
| English, Spanish | Jestem zimno. / Mam zimno. | Jest mi zimno. |
| Spanish | Mam głód. | Jestem głodny. / Jestem głodna. |
If you speak Russian or Ukrainian, look through the extensive lists of mistakes made by Russian speakers and mistakes made by Ukrainian speakers.
How to get rid of recurring mistakes
The most effective method is keeping your own mistake journal: you write down the mistake, the correct form and the rule, and then deliberately use the correct form in new sentences. After a few weeks you can see which mistakes have disappeared and which keep returning.
- Collect mistakes from corrected texts and recordings – not from a textbook, but from your own speech and writing.
- Group them: cases, aspect, numerals, vocabulary, spelling.
- Fix one type of mistake each week – write ten sentences of your own with the correct form.
- Check your progress on a new text or recording.
Your own mistakes are the hardest to notice yourself. At a mock exam a teacher will show you which of them cost the most and where to start correcting.
Frequently asked questions
Can one weak module fail the whole B1 exam?
Yes. At level B1 for adults you need at least 50% of the points in each module of the written part and in the oral part. A high result in one part does not make up for another that was not passed.
Do spelling mistakes lower the mark in B1?
Spelling and punctuation are among the requirements in writing, so they affect the assessment of accuracy. However, the B1 standard allows shortcomings that do not significantly disrupt communication – a single mistake does not ruin a text.
What happens if I use a phone during the exam?
Bringing into the room devices for transmitting, receiving or recording information, or aids, is grounds for interrupting and annulling the exam. This also applies to communicating with other candidates.
Is it better to speak simply and without mistakes, or ambitiously with mistakes?
Aim for the happy medium: use constructions you know well and add a few more complex ones, e.g. sentences with który or gdyby. Simple sentences alone limit the assessment of range, and overly ambitious ones limit accuracy.
Sources
- Rozporządzenie Ministra Nauki i Szkolnictwa Wyższego z 14 lutego 2025 r. w sprawie egzaminów z języka polskiego jako obcego (Regulation of the Minister of Science and Higher Education on examinations in Polish as a foreign language), Dz.U. 2025 poz. 217 – § 12 ust. 2 and 3, § 13, § 19, § 23 pkt 1 lit. b, annex 1 (level B1)
A full online B1 exam. A teacher marks your writing and speaking against the State Commission's criteria, and you get a report with recommendations.
See also
- GrammarWhat grammar B1 requires, which topics cause the most trouble, and a short exercise with a key.Read →
- WritingTypes of written text at B1, ready-made phrases for formal and informal letters and a step-by-step writing plan.Read →
- SpeakingHow the oral part runs, the types of speech, rescue phrases and an answer pattern that works for every topic.Read →