Adding the letters able or ible to a word or word part makes it an adjective. An adjective is used to describe a noun. In the sentence Macy had an adorable cat, able is added to adore in order to describe what kind of cat Macy had. Below is one basic rule for adding the able/ible endings. Study the rule and then complete the practice exercise.
Rule : add able to roots that can stand alone and ible to roots that cannot stand alone
return + able = returnable
terr + ible = terrible
Special instructions:
always drop the final e
change y to i
then add ible/able ending
adore + able = adorable
This page http://literacy.kent.edu/Oasis/ndakota/spelling/Lesson6.html
