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Name _______________________________________
Lesson 20
The prefixes com and in
| com + gressional |
= congressional |
in + tuition |
= intuition |
| com + servative |
= conservative |
in + sulation |
= insulation |
| com + notation |
= connotation |
in + nocent |
= innocent |
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| con + mentator |
= commentator |
in + munity |
= immunity |
| com + mute |
= commute |
in + mortality |
= immortality |
| com + mercial |
= commercial |
in + mediately |
= immediately |
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| com + petition |
= competition |
in + patient |
= impatient |
| com + puter |
= computer |
in + postor |
= impostor |
| com + promise |
= compromise |
in + peached |
= impeached |
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| com + bustion |
= combustion |
in + bedded |
= imbedded |
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A prefix may be spelled in several different ways.
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| 1. |
Look at the first three words in each column. Are the prefixes com
and in spelled with an n or an m
when they are added to form these words? _____
Why do the words connotation and innocent have
double consonants? ______________________________________________ |
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| 2. |
Look at the remaining words in each column. How is the prefix com
spelled when it is added to roots that being with m, p,
or b? _____
How is the prefix in spelled when it is added to words or
roots that begin with m, p, or b? _____
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Lesson Generalization
The prefixes
com and in follow the same spelling
pattern. Both are spelled with an n before most letters of
the alphabet. Both are spelled with an m before roots or words
that begin with the letters m, p, or b. They
are spelled this way to make more compatible combinations that are easier
to pronounce.
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- Say inmediately and immediately. Say conmute and commute.
Mnemonic device: Remember common compatible combinations.
Double consonants often result from joining prefixes and roots. Remember
that one consonant belongs to the prefix, and one belongs to the root. |
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Grade 8 Spelling SkillBuilders |
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