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Practice · B1 Intermediate

5 ways into
Must and Can't (Deductions).

Fill blanks, build sentences, sort words, hunt mistakes — submit and get detailed feedback on every answer.

5 exercises3 formatsFeedback after submissionUnlimited retries

5 exercises

  1. Fill in the blankUp next

    Exercise 1 of 5 · 12 blanks

    Must and Can't - Mystery Dinner Party

    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.

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  2. Fill in the blank

    Exercise 2 · 12 blanks

    Must and Can't - Travel Clues

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

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  3. Build the sentence

    Exercise 3 · 10 sentences

    Build Present Evidence Deductions

    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 Start exercise
  4. Build the sentence

    Exercise 4 · 10 sentences

    Build Past Deductions and Questions

    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 Start exercise
  5. Find the mistake

    Exercise 5 · 12 corrections

    Must and Can't - Find and Fix

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

    Start Start exercise

About this practice

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. Submit each exercise to get detailed feedback, see the correct answer in context, and build confidence in real sentences. Retry any exercise as many times as you like. Want the rules first? Back to the 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
  • Feedback after submission