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B1Teens, Adults· 30–40 minutes

Modals Deduction - Grammar Practice

A B1 lesson on modals deduction, with contextual examples, grammar guidance, controlled practice and space for written answers. Includes an answer key and teacher notes.

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What’s in the worksheet?

  • Contextual examples and grammar guidance
  • Choose, complete and rewrite activities
  • Space for written answers
  • Answer key and teacher notes on page 3

Make present deductions from evidence.

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Page 3 of Modals Deduction - Grammar Practice - answer key

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A simple way to teach it

Before the lesson

Use learner pages 1–2; keep the answer key on page 3 separate until feedback.

  1. Read the office-light discussion and connect each conclusion to the flight, van or other clues.
  2. Complete the cake, cup, meeting and lights items; rewrite conclusions with must, might and can't.
  3. Write three clue-and-conclusion pairs, then solve the partner mystery and explain your reasoning.

Support and extension

Must here means a strong deduction, not a rule. Can't expresses a strong negative deduction; must not is not its normal equivalent in this use.

Suggested approach. Adjust the pace and number of questions to suit your class.

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