Unit 12
Word work: prefixes
Prefixes are groups of letters we put at the beginning of root words to change their meaning. The prefixes un- , im- and dis- mean not . un + happy: unhappy Greg had to stay home. He was unhappy . im + patient: not impatient Greg did not want to wait. He was impatient . dis + obey = disobey: not obey Greg decided to disobey his mother. 1 M ake new words. Add prefixes from the words in the circle to the words in the box. Example: un + tidy è untidy
WB 3 p77
appear patient possible
lucky
approve
un- im- dis-
+
like fair
tidy
2 Make your own sentences using the new words from Exercise 1.
The prefix re- means again . re + write: write again
The teacher told the girl to rewrite her story.
3
Add the prefix re- to these verbs.
plant pay build place play cycle
4 Complete the sentences with the new verbs you made.
1 Mrs. Clark wants to ____ her old car. 2 The teams had to _____ the match.
3 After the storm, we had to _____ our house. 4 The students helped to _____ the trees. 5 We can _____ old jars and bottles. 6 You must ____ the money you owe your friend.
• Exercise 2: Model a few example sentences using the new words from Exercise 1. Then students can make their own sentences orally. • Extension: Some students may be able to write their sentences.
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