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Advanced B1 Grammar Structures for the PET Exam

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.

Locale-specific study guides

Pass-rate data, regulatory context, and study tips for Advanced B1 Grammar Structures all change by candidate locale. Pick your context:

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.

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
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.

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