Complete Sentences and Fragments Worksheet — Grade 1
This Grade 1 practice sheet helps students recognize complete sentences, identify subjects, and complete sentence fragments by filling in missing verbs.
Understanding complete sentences is one of the most important early writing skills a child can develop. A complete sentence expresses a whole idea — it tells who or what the sentence is about, and what that person or thing does. When a group of words is missing one of those parts, it is called a fragment. This worksheet gives first graders two types of practice. In the first part, students read complete sentences and circle the subject — the who or what. In the second part, students see sentences with a missing verb and write in the word that completes the thought. Use this sheet as a guided activity the first time through, reading each item aloud together before the student marks an answer.
Complete Sentences and Fragments Worksheet — Grade 1
Read each sentence carefully. Then follow the directions for each part.
Remember
- A complete sentence tells a whole idea. It has a who or what part and a doing part.
- A fragment is not a complete sentence. It is missing a part, like who, what, or what happens.
- To fix a fragment, add the missing part. Example: 'The dog.' becomes 'The dog runs.'
Part A — Find Who or What
Each group of words below is a complete sentence. Circle the part that tells who or what the sentence is about.
- 1.
My dog barks at the mail truck.
- 2.
Lila eats an apple at lunch.
- 3.
The little frog hops on a rock.
- 4.
We play outside after school.
- 5.
A yellow bus stops on our street.
Part B — Complete the Sentence
Each sentence is missing one word. Write the missing word in the blank to make a complete sentence.
- 6.
Birds ____ south for the winter.
- 7.
Rain ____ from the dark clouds.
- 8.
We ____ our hands before lunch.
- 9.
Dogs ____ their tails when happy.
- 10.
Fish ____ in the water.
Answer key
Part A — Find Who or What
- 1.My dog
- 2.Lila
- 3.The little frog
- 4.We
- 5.A yellow bus
Part B — Complete the Sentence
- 6.fly
- 7.falls
- 8.wash
- 9.wag
- 10.swim
What this worksheet teaches
- Identify the subject in a complete sentence by circling who or what it is about.
- Distinguish between a complete sentence and a sentence fragment at the Grade 1 level.
- Complete a sentence fragment by writing the missing verb in the blank.
The language it drills
“Lila eats an apple at lunch.” has one answer in the key: “Lila”.
Notes for the grown-up
- Students often think a long group of words is always a sentence. Remind them to check for both a subject and an action.
- If a student struggles, read the sentence aloud and ask: who or what is doing something? What are they doing?
- A student is ready to move on when they can label both parts of a new sentence without a prompt or clue words.
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