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16.22: Lesson Forty-six

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Review of Suffixes

1. Analyze each of the following words into stem plus one suffix:

Word Analysis: Stem + Suffix
teachable teach + able
comprehensible comprehens + ible
modifiable modif\cancel{y}+ i + able
carriage carr\cancel{y}+ i + age
susceptibility susceptibil + ity
anxiety anxi + ety
presentable present + able
necessity necess + ity
appreciable appreci + able
permissible premiss + ible
baggage bag + g + age
uncertainty uncertain + ty
unforgettable unforget + t + able
divisible divis\cancel{e} + ible
advantage advant + age
divinity divin\cancel{e} + ty
society soci + ety
specialty special + ty
tolerable toler + able
flexible flex + ible
language langu + age
indescribable indescrib\cancel{e} + able
quantity quant + ity
disposable dispos\cancel{e} + able
percentage percent + age
communicable communic + able
ferocity feroc + ity
royalty royal + ty
variety vari + ety
simplicity simplic + ity
deductible deduct + ible
irritable irrit + able

2. Among the adjectives ending in -able and -ible there are instances of rules that you studied in earlier lessons. For each rule given below find instances from the adjectives above and fill in the blanks:

a. Stems that form nouns in <ation> form adjectives in -able:

& presentable

b. Verbs that end in <ate> form adjectives in -able:

& irritable && communicable && appreciable && tolerable

c. Verbs that end in <y> form adjectives in -able:

modifiable

d. Native English verbs form adjectives in -able:

& teachable && unforgettable

e. If the verb and adjective and noun use one form of the base while the noun in <ion> uses another, the adjective will be formed in -able:

& modifiable && indescribable && disposable

f. But if the verb and noun use one form of the base while the verb uses the other, the adjective will be formed in -ible:

& comprehensible && permissible && divisible

Teaching Notes.

Item 1. In divisible we need the final <e> on the base vise since it occurs in word-final position in the word devise. But I would not complain much if a student chose simple addition in this analysis.

Items 2e and 2f. The adjective, noun, verb forms involved here are the following:

Adjective Noun Verb
modifiable modification modify
indescribable (in)description (in)describe
disposable disposition dispose
comprehensible comprehension comprehend
permissible permission permit
divisible division divide

There is an interesting contrast between the synonyms divisible and dividable. Notice that division follows the pattern in 2f, but dividable follows that in 2e, with the forms dividabie, division, divide.

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Grades:

1 , 2 , 3 , 4 , 5

Date Created:

Feb 23, 2012

Last Modified:

Apr 29, 2014
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