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8.10: The Prefix Sub-

Difficulty Level: At Grade Created by: CK-12
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The Prefix Sub-

1. You have seen that when the prefix ad- is added to a stem, the <d> and [d] often assimilate and become more similar to the stem's first letter and sound, as in attempt and appear: ad + t + tempt and ad + p + pear

In the same way, when the prefix sub- is added to a stem, the <b> and [b] often assimilate to become more similar to the stem's first letter and sound. Thus, sub + m + mon = summon

2. In each of the words below, the first letters are some form of the prefix sub-. In some of them the ‘b’ and [b] have asimilated, and in some they have not. Analyze each word into its prefix and stem, showing any assimilation:

Word = Prefix + Stem
summon = sub+ m + mon
success = +
supply = +
subject = +
suffer = +
support = +
submarine = +
sufficient = +
suppose = +
substitute = +
suburbs = +
succeed = +
surrogate = +
suppress = +
suggest = +
submitting = +

2. Sort the words into these two groups:

3. Now sort the words in which the <b> and [b] assimilated into these groups:

Word Find. This Find contains twenty words that start with some form of the prefix sub-:

submitsufficientsubscribesubstitutesucceedsuccesssubtractsuffocatesubjectsubduesubmarinesupposesupportsupplysuccumbsuccinctsurrogatesuffersuggestsummon

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Grades:
1 , 2 , 3 , 4 , 5
Date Created:
Feb 23, 2012
Last Modified:
Jan 16, 2015
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