Subject & Predicate — Free Grade 3 Grammar Worksheet (Ocean)

A free printable Grade 3 grammar worksheet on subject & predicate. Three fun activities — circle the correct word, write the word, and write your own sentence — with kid-friendly icons, handwriting lines, and a full answer key. Instant PDF, no sign-up.

Third graders identify the subject and predicate in ocean-themed sentences, learning to split each sentence at its grammatical core and understand the role that each part plays. Teachers can use it during a sentence structure unit to build the analytical habits students need for more complex grammar and writing tasks ahead. The ocean setting gives colorful example sentences that make this foundational skill feel fresh and engaging.

Answer Key