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6.22: More About Twinning in Longer Words

Difficulty Level: At Grade Created by: CK-12
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More About Twinning in Longer Words

1. Here are the two sets of free stems that you found in the last lesson. Mark the last three letters of each stem, ‘v’ for vowels, ‘c’ for consonants, as we have done with forbid:

Sort the twelve stems into this matrix:

2. How many vowel sounds were there in each of the twelve stems? ______. Did the stems in which twinning occurred end in CVC? ______

3. You twin the final consonant of a free stem that has two vowel sounds only when the free stem ends ______.

4. Each of the words below contains a free stem and a suffix. Sometimes the final consonant of the stem was twinned when the suffix was added; sometimes it was not. Each of the free stems contains two vowel sounds. Analyze each word into its free stem and suffix, showing any twinning that has taken place:

Word = Free Stem + Suffix
submitter = +
equipment = +
forbids = +
equipped = +
zigzagged = +
commits = +

5. Sort the six words into these two groups. Notice that we are working here with the whole original word from the left column, not just with the free stems:

Words in which . . .
twinning occurred twinning did not occur

6. In the words in which twinning occurred, did the suffix start with a vowel or did it start with a consonant? ______.

7. You twin the final consonant of a word with two vowel sounds when the word ends ______ and you add a suffix that starts with a ______.

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Feb 23, 2012
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