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B1Teens, Adults· 30–40 minutes

Prefix un-

Build vocabulary through prefix un-, then use the target words in gap-fill and discussion activities. Includes a teacher answer key.

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What’s in the worksheet?

  • Target vocabulary with clear definitions
  • Gap-fill practice using each target word
  • Discussion questions for speaking practice
  • Teacher answer key on page 3

Build vocabulary with un- adjectives for everyday problems, then use the eight target words in sentence completion and discussion.

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Page 1 of Prefix un-

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Page 2 of Prefix un-

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Page 3 of Prefix un- - answer key

Page 3 of 3 · Answer key · A4 printable PDF

A simple way to teach it

Before the lesson

Use pages 1–2 and keep the teacher key on page 3 for feedback. Introduce unusual and unnecessary, checking meaning and pronunciation before the gap fill.

  1. Use unfair versus unusual to show that a negative prefix does not tell learners the whole meaning.
  2. Complete the eight sentences using each vocabulary word once. Compare choices with a partner and explain the context clues before checking the key.
  3. Discuss unfair rules, unfinished work and unreliable services, using a target adjective in each answer. Use the five printed questions for pair discussion and short notes; responses are individual, not fixed-key answers.

Support and extension

Support with base-word pairs such as fair / unfair; extend by describing a service problem without naming the target word.

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

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