Grade 3 English Grammar Worksheet: Subjects & Predicates (Age 8)

Instructions

This worksheet will help you become a Subject and Predicate detective! Every complete sentence has two main parts. The Subject tells who or what the sentence is about. The Predicate tells what the subject is doing or being.

1. Read the directions for each section carefully.
2. Use a pencil to mark your answers.
3. Complete the challenge section if you are ready for advanced grammar practice!

Section 1: Matching Magic

Draw a line to match each Subject (Part A) with the Predicate (Part B) to create a complete and sensible sentence.

Section 2: Subject Spotting

Read each sentence below. Underline the complete subject (the who/what part) of the sentence.

Example: The friendly baker makes delicious bread.

1. My older brother rides his bicycle to school every day.
2. The scary monster hid under the small bed.
3. A powerful thunderstorm woke us up at midnight.
4. Little red cars waited patiently at the traffic light.
5. In the tall dark house lived an old mysterious man.

Section 3: Predicate Power

Read each sentence below. Circle the complete predicate (the doing/being part) of the sentence.

Example: The baby bird sings a cheerful song every morning.

1. That talented artist painted a beautiful picture for the competition.
2. Dad quickly prepared a big breakfast for the family.
3. The energetic kittens chased the laser pointer around the room.
4. Our tired teacher graded the tests until late last night.
5. The bright, shiny planets revolve around the sun.

Section 4: Sentence Builder Challenge

Create five new sentences! Write your own Subjects and Predicates in the correct columns, then write the final complete sentence.

Section 5: The Super Challenge (Differentiated Learning)

A. Identify the Missing Part: Write S if the Subject is missing or P if the Predicate is missing to make a complete sentence.

1. __ swam quickly across the pool. (Answer: ___)
2. The principal of the school __. (Answer: ___)
3. __ is the funniest person I know. (Answer: ___)

B. Combine the Action: Rewrite the following sentence using a compound predicate (two actions joined by 'and').

Original: The gymnast jumped high. The gymnast landed gracefully.

New Sentence: ____

Answer Key

Section 1: Matching Magic

1. My new puppy -> b. barked loudly at the mail carrier.
2. The bright sun -> c. shines warmly in the sky.
3. Tall green trees -> d. sway in the gentle breeze.
4. The migrating birds -> a. are flying south for the winter.

Section 2: Subject Spotting (Underlined Text)

1. My older brother rides his bicycle to school every day.
2. The scary monster hid under the small bed.
3. A powerful thunderstorm woke us up at midnight.
4. Little red cars waited patiently at the traffic light.
5. In the tall dark house lived an old mysterious man. (The subject sometimes comes after the predicate!)

Section 3: Predicate Power (Circled/Bolded Text)

1. That talented artist painted a beautiful picture for the competition.
2. Dad quickly prepared a big breakfast for the family.
3. The energetic kittens chased the laser pointer around the room.
4. Our tired teacher graded the tests until late last night.
5. The bright, shiny planets revolve around the sun.

Section 4: Sentence Builder Challenge

(Answers will vary, check that the student's Subject is a noun/pronoun phrase and the Predicate includes a verb and tells what the subject did.)

Section 5: The Super Challenge

A. Identify the Missing Part:

1. S
2. P
3. S

B. Combine the Action: New Sentence: The gymnast jumped high and landed gracefully.