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B1 · Intermediate

Must and Can't (Deductions) — practice exercises

Interactive fill-in-the-blank, sentence-building, and error-correction exercises with instant feedback.

5 exercises

  1. Must and Can't - Mystery Dinner Party

    Must and Can't - Mystery Dinner Party

    Fill in the blank

    Read each sentence carefully and decide what is possible or impossible. Click on each blank and choose the correct answer (must or can’t) from the dropdown menu. Some sentences have more than one blank, so make sure you complete all of them.

    Start
  2. Must and Can't - Travel Clues

    Must and Can't - Travel Clues

    Fill in the blank

    Read each sentence carefully and decide what is possible or impossible. Click on the blank and choose the correct answer from the dropdown menu.

    Start
  3. Build Present Evidence Deductions

    Build Present Evidence Deductions

    Build the sentence

    Tap the words in the correct order to build each deduction. Use must for a strong positive conclusion and can’t for something the evidence makes impossible. One word does not belong.

    Start
  4. Build Past Deductions and Questions

    Build Past Deductions and Questions

    Build the sentence

    Tap the words in the correct order to build each past deduction, prohibition, or natural question. Use must have or can’t have with past participles. One word does not belong.

    Start
  5. Must and Can't - Find and Fix

    Must and Can't - Find and Fix

    Find the mistake

    One word in each sentence is wrong. Tap it, then choose the correction.

    Start

Put Must and Can't (Deductions) into practice with 5 interactive fill-in-the-blank, sentence-building, and error-correction exercises at B1 (Intermediate) level. Every question is checked instantly, so you can catch mistakes, see the correct answer in context, and build confidence using Must and Can't (Deductions) in real English sentences.

Work through the exercises above in order or jump straight to the one you want. You can retry any exercise as many times as you like, and your score updates as you go. When you want to review the rules first, head back to the Must and Can't (Deductions) lesson.

  • Fill-in-the-blank questions with multiple-choice answers
  • Sentence-building questions: tap the words into the correct order
  • Error-correction questions: spot the wrong word, then choose the fix
  • Instant feedback and scoring on every attempt
  • Unlimited retries to reinforce Must and Can't (Deductions)
  • Suitable for B1-level English learners