Prefixes, Suffixes, and Base Words Lesson Goals: 1) Students will learn to identify base words. 2) They will learn the meaning of various prefixes and suffixes. 3) They will learn how these prefixes and suffixes change the meanings of base words.

Base Words A base word is a word in its simplest form. A base word has nothing added to it. Examples: Accept Heat Obey Friend Success

Base Words Write the base words. Played Running Reheat Quickly Unhappy

Prefixes Prefixes are added to the beginning of a base word. They change the meaning of the base word. Un + success = unsuccessful Re + appear = reappear

Prefixes The prefix un means not or the opposite of. Uncomfortable means not comfortable. The prefix mis means wrong or bad. Misbehaving means behaving badly. The prefix re means again. Rewrite means to write again. The prefix pre means before. Preschool means school prior to starting kindergarten.

Prefixes Draw a line to the meaning of the prefix. again Opposite of, lack of, not Bad, badly, wrong Not Before Below small im-, in-, non- dis-, in-, non- mis- pre- re- sub- micro-

Suffixes Suffixes are added to the end of a base word. They change the meaning of the base word. wonder + ful = wonderful large + est = largest happy + ness = happiness

Suffixes The suffix -ful means full of. Colorful means full of color. The suffix -ible means capable of being. Sensible means capable of sense. The suffix -ly means in a certain way. Quickly means in a quick way. The suffix -ish means having the quality of. Childish means having the quality of a child.

Here are some common suffixes:

Suffixes Draw a line to the meaning of the suffix. Able to, suitable, or inclined to Forming an action Full of, as much as will fill Someone who, more so Without, that does not Having qualities of, manner or degree Full of -ful -er -ly -able -less -ous -tion

Activity Complete pages 4 and 5 in Language Power. When you are done, exchange your questions from yesterday with a partner if you have not done so already.