Affix Building Answer Key

About This Worksheet

This Grade 7 Language Arts worksheet helps students create new words by adding prefixes and suffixes to familiar roots. Students work with roots such as view, trust, appear, care, and heat and choose from affixes including re-, un-, mis-, pre-, -ful, and -less. They then define the new word and use it in a complete sentence. For example, adding re- to view creates review, which means to look at or study something again.

Learning Goals

The main goal is to help students understand how word parts work together to create meaning. Students should already know that a root carries the central meaning of a word. This activity moves them toward using prefixes and suffixes to build, define, and apply new vocabulary. It supports CCSS.ELA-LITERACY.L.7.4, which asks students to use affixes and roots as clues to word meaning.

Student Tasks

On this worksheet, students will add one or more affixes to five root words. For every new word, they must write a definition and an original example sentence. The final section asks them to choose one created word and explain how its root and affix combine to form the full meaning. This gives students practice with word construction, vocabulary understanding, and sentence use.

Common Challenges

Some students may join a root and affix in a way that does not form a real or useful word. Others may define only the root and forget to include the meaning added by the prefix or suffix. Spelling changes can also occur when some endings are attached. Encourage students to separate the word into parts and explain what each part contributes before writing the definition.

Teaching Suggestions

A teacher can build one sample word on the board and label the meaning of the root and affix underneath it. Students can test several possible combinations and decide which ones create real words. At home, a parent can ask the child to cover the affix and explain how the meaning changes when it is added back. This makes morphology feel like a logical system rather than a memorization task.

Worksheet Features

The worksheet includes six possible affixes and five familiar root words. Each item requires a new word, definition, and original sentence, giving students several layers of practice. A final explanation section checks whether they understand how the pieces create meaning together. This page works well for morphology lessons, vocabulary growth, independent practice, or enrichment.