Adjectives -er Worksheet

Comparative adjectives are how young writers put two things side by side and say which one has more of a quality: a turtle is slower, a box is heavier, a puzzle is easier. Third graders learn that most short adjectives simply take the ending -er, that a few change their spelling first, and that longer adjectives use the word more instead. This adjectives -er worksheet walks students through all three of those moves in one place, so the rule and its exceptions are practiced together rather than in isolation.

This 3rd grade adjectives worksheet is a no-prep printable you can hand out as guided practice, morning work, homework, or a quick check before a grammar assessment. Part A gives six base adjectives and asks students to add -er, quietly covering every spelling change they need: plain endings, doubling a final consonant, changing y to i, and dropping a silent e. Part B moves the skill into real sentences, where students must decide whether -er or the word more is correct before they write. Part C finishes with the irregular forms that never follow the pattern at all.

What’s Included

• 1 print-ready PDF worksheet
• Answer key
• 15 comparative adjective activities in three parts: 6 add-the-ending items, 5 sentence completions, and 4 irregular forms

Students grow with this adjectives -er worksheet for three reasons. First, it separates the sound of the rule from the spelling of the rule, so a child who says “bigger” correctly also learns why the g doubles. Second, the sentence section forces a real decision instead of a reflex, because “more useful” and “heavier” sit right next to each other and only one pattern fits each word. Third, the irregular forms are taught as their own small set, which is exactly how strong readers store them, rather than as puzzling exceptions dropped in at the end of a lesson.

Teachers and parents can stretch this skill well past the page. Line up two classroom objects and ask students to describe the pair out loud in a full sentence, then write it. Play a quick comparison game where one partner names an adjective and the other supplies the comparative form before a timer runs out. Take a walk and collect comparisons from the real world, or reread a favorite picture book and hunt for every word ending in -er. Sorting a stack of adjective cards into an “-er” pile and a “more” pile also makes a fast, hands-on center activity.

Related Resources

• Comparative and Superlative Adjectives Worksheet
• Sorting Adjectives Worksheet
• Adjectives Pictures Worksheet
• Adjective Song (Have Fun Teaching on YouTube)