Printable Identify Suffixes Worksheet | Grade 1 ELA

Mastering word endings is a foundational step in early literacy development. This Grade 1 English Language Arts worksheet focuses on identifying and applying common suffixes—including -s, -es, -ed, and -ing—to base words within the context of complete sentences. By selecting the correct suffix to match the sentence's meaning, students develop a deeper understanding of verb tense and pluralization.

At a Glance

• Grade: 1 · Subject: ELA
• Standard: CCSS.ELA-LITERACY.L.1.4.C — Identify frequently occurring root words and their inflectional forms like looks, looked, and looking
• Skill Focus: Common Suffixes (-s, -es, -ed, -ing)
• Format: 4 pages · 12 problems · Answer key included · PDF
• Best For: Small group vocabulary or independent practice
• Time: 15–20 minutes

This comprehensive four-page PDF resource provides 12 targeted multiple-choice problems designed to reinforce morphological awareness. Each page guides students through sentences where a base word requires a suffix to "sound right" and convey the intended meaning. The layout includes clear checkboxes for easy marking, a "Quick Challenge" section for higher-level application, and a helpful summary tip sheet explaining the meaning of each suffix.

Skill Progression

• Guided practice: The first three problems introduce the concept of "sounding right" with simple sentence structures and familiar verbs to build initial confidence.
• Supported practice: Problems 4 through 10 increase the variety of verbs and contexts, requiring students to distinguish between past, present, and continuous actions using -ed and -ing.
• Independent practice: The "Quick Challenge" asks students to look for specific textual clues—like "now" or "yesterday"—to determine the appropriate inflectional ending for the final two items.

This gradual-release model moves students from initial recognition to contextual application, mirroring the "I Do, We Do, You Do" instructional framework for durable learning.

Standards Alignment

This worksheet is directly aligned to CCSS.ELA-LITERACY.L.1.4.C, which requires students to identify root words and their inflectional forms. It also supports CCSS.ELA-LITERACY.L.1.1.E regarding the use of affixes as clues to word meaning. Both standard codes can be copied directly into lesson plans, IEP goals, or district curriculum mapping tools to document evidence-based instructional alignment.

How to Use It

This resource is best used during the "You Do" phase of a lesson on verb tenses or plurals. Teachers can distribute it after a whole-class brainstorm of words ending in -ing. As a formative assessment tip, observe whether students are whisper-reading the sentences to test each suffix choice; those who do not may need additional auditory-phonological support to hear the grammatical mismatch. Expected completion time is 15-20 minutes.

Who It's For

This worksheet is designed for first-grade students but serves as an excellent intervention tool for second graders needing a morphology refresher. It is particularly effective for English Language Learners (ELLs) who are navigating the complexities of English verb endings. Pair this resource with a short reading passage from a leveled reader to help students identify these same suffixes in authentic, non-itemized text.

According to the RAND AIRS 2024 report on elementary literacy, explicit instruction in morphology—specifically the recognition of inflectional endings—is a significant predictor of later reading comprehension success. This worksheet targets that critical "sweet spot" of Grade 1 development where students transition from simple decoding to understanding how word parts modify meaning. By practicing with CCSS.ELA-LITERACY.L.1.4.C aligned materials, learners build the internal grammar rules necessary for fluid reading and accurate writing. The inclusion of suffixes like -ed for past tense and -ing for progressive action directly supports the NAEP framework's emphasis on linguistic structures. When students can automatically identify that "rain" becomes "raining" to show current action, cognitive load is reduced, allowing for deeper focus on the overall message of the text. This resource provides the high-repetition, low-threat practice environment recommended by ScienceDirect TpT Analysis for durable skill acquisition in early childhood settings.