Vocabulary Development (Prefix in and un), Comprehension


Welcome to Class !!

We are eager to have you join us !!

In today’s English Language class, We will be carrying out some Vocabulary Development. We will also read the Comprehension Passage: Directions on Shelltox Tin. We hope you enjoy the class!


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Prefixes “in” “im” and “dis” to express the opposite


A prefix is a word-element added to the beginning of a word. It can also be defined as a letter or group of letters added to change its meaning.

A prefix can be added to words to realize their opposites. The prefix “in”, “im”, “un” and “dis” mean “NOT” as in:

  1. Happy – unhappy (not Happy)
  2. Possible – impossible (not Possible)
  3. Adequate- inadequate (not Adequate)
  4. Obedient – disobedient (not Obedient)


Here are more examples:

  • Fertile – infertile
  • Tolerant – intolerant
  • Sufficient – insufficient
  • Moral – immoral
  • Legal – illegal
  • Kind – unkind
  • Important – unimportant
  • Regular – irregular
  • Respectful – disrespectful
  • Loyal – disloyal
  • Like – dislike
  • Friendly – unfriendly
  • Literate – illiterate



Evaluation: Write the antonyms of the following words with the appropriate prefixes

  1. Advantages
  2. Relevant
  3. Reasonable
  4. Abuse
  5. Orderly
  6. Agree
  7. Usual
  8. Responsible
  9. Proper
  10. Correct



Reference: Countdown English by Ogunsanwo; Oxford Advanced Learner’s Dictionary; English Grammar by P.O. Olatunbosun.

Reading Assignment: Read page 104 of the English Grammar by P.O. Olatunbosun.



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COMPREHENSION: Directions on Shelltox Tin


The passage is about the pieces of information printed on a Shelltox tin on how to use the Shelltox to kill household pests like cockroaches, mosquitoes, bed-bugs, ticks, spiders, etc.


Evaluation: Do practice 2 on page 82 of the Effective English Book 3.

Reference: Effective English for JSS 3.

Reading Assignment: Read page 82 of Effective English for JSS  Book 3.




Add prefixes to the following words to form the opposites.

  • Legal
  • balance
  • accurate
  • behave
  • regular


Give the synonyms of the following words.

  • Accuse
  • achieve
  • fertile
  • govern
  • increase


Weekend Assignment

Do practice Exercise 18 on page 78 of English Grammar by P.O. Olatunbosun.

Do section (on page 238 – 239) (56-60) of Effective English for JSS Book 3.




We have come to the end of this class. We do hope you enjoyed the class?

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