Using Prefixes to make Opposites. Page 3 of 4.
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ir
im
il
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Means ‘not’
Use ‘ir’ if the root
word starts
with ‘r’.
Means ‘not’
Use ‘im’ if the root
word starts
with ‘p’ or ‘m’.
Means ‘not’
Use ‘il’ if the root
word starts
with ‘l’ .
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ir
irregular
odest
im iimm
mperfect
il
illegal
© Sally Northen