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PET · Advanced B1 Grammar Structures · Mexico

Advanced B1 Grammar Structures for the PET Exam — Mexican candidates

10% of the PET test plan. B1 grammar extension: modals for deduction, wish/if only, gerunds vs infinitives, and comparatives. Calibrated for Mexican candidates.

Behind every published pass rate is a distribution of which topics caused most of the failures. This is one of those topics. Advanced B1 Grammar Structures sits at roughly 10% of the Cambridge Preliminary English Test (B1) content distribution — Advanced B1 grammar structures include: modals for deduction (must be/can't be/might be), wish/if only (unreal situations), gerund vs infinitive choice (enjoy doing/want to do), and comparative/superlative structures. These features distinguish B1 from A2 performance. Pass rates for the PET are published annually by the awarding body and vary by cohort and locale. For Mexican candidates preparing for PET, the calibration of study to local context matters: Spanish is the testing language for domestic exams (Ceneval); English-language proficiency tests (TOEFL, IELTS, Cambridge) are popular for U.S. and Canadian study tracks.

Pass rates for PET (Mexico) are published periodically by the awarding body.

Common failure modes

These are the patterns that cause most candidates to lose marks on this topic. Recognising them in advance is half the work.

  • !Using "must" for deduction and "have to" interchangeably — they have different strength
  • !Gerund/infinitive errors: "I enjoy to swim" instead of "I enjoy swimming"
  • !Incorrect comparative: "more better" instead of "better"

Study tips

  • 1Memorize the 20 most common gerund-taking verbs: enjoy, finish, avoid, consider, suggest, mind, miss, keep, risk, practise.
  • 2Learn the 20 most common infinitive-taking verbs: want, need, hope, plan, decide, agree, refuse, manage, offer, seem.
  • 3Drill deduction modals: must = I'm almost certain; might = possible; can't = impossible.
  • 4For Mexican candidates testing on PET, English-Spanish bilingual study materials accelerate vocabulary acquisition; use side-by-side passage translations to build decoding speed.

Sample PET Advanced B1 Grammar Structures questions

These sample items mirror the format and difficulty of real PET questions. Practice with thousands more on the free Koydo question bank.

  1. 1

    She left the office early. She _____ be feeling unwell.

    • AmustCorrect
    • Bcan
    • Cshould
    • Dwould
    Why this answer?

    "Must be feeling" expresses logical deduction — the speaker is almost certain she is unwell based on evidence (leaving early). "Can" is not used for deduction; "should" implies expectation/advice; "would" implies a hypothesis about the future.

Frequently asked questions

How many grammar structures does B1 require compared to A2?
The Cambridge Grammar for B1 adds approximately 15–20 new structures beyond A2, including: all conditional types, passive voice across tenses, reported speech, relative clauses, modal verbs for deduction, wish/if only, gerund/infinitive distinction, and used to/would for past habits.
What is the PET pass rate for Mexican candidates?
Pass rates for PET candidates in Mexico are published periodically by the awarding body. Practice questions, full-length simulations, and weak-area drills are the highest-impact way to improve your odds.
How long should Mexican candidates study Advanced B1 Grammar Structures for the PET?
For most candidates, focused mastery of Advanced B1 Grammar Structures requires 20–40 hours of deliberate practice — drilling sample questions, reviewing failure modes, and timing yourself against exam conditions. Spanish is the testing language for domestic exams (Ceneval); English-language proficiency tests (TOEFL, IELTS, Cambridge) are popular for U.S. and Canadian study tracks. Combine Advanced B1 Grammar Structures study with full-length mock exams in the final two weeks before your test date.

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