Word families and word parts
Endings (suffixes) that change the form of words
- A suffix is a group of letters that you add to the end of a root word.
- It changes the class or function of the word:
adding suffixes like -ion or -ment to some verbs forms nouns;
adding the suffix -al to certain nouns forms adjectives; and
adding the suffix –ly to certain adjectives forms adverbs:
educate (v) education (n) educational (adj) educationally (adv)
develop (v) development (n) developmental (adj) developmentally (adv)
To do
- The difference between the suffixes -ing and -ed (Grammar Quizzes.com)
More info
- Common suffixes in English (About.com)