Complete Sentences
Basics on the topic Complete Sentences
Do you want to know how to write complete sentences? Learn about complete sentences, run-on sentences, and fragments through our video, worksheets and exercises.
Complete Sentences – Introduction
Have you ever heard someone asking for an answer in a complete sentence? Let’s have a look at the meaning of the term complete sentences.
A sentence is a group of words that make up a complete thought. When we write sentences, we always begin with a capital letter and end with punctuation, such as period, exclamation mark, or question mark.
Complete sentences always have a subject and a predicate. A subject is a person, thing, or place that is performing the action of the sentence. A predicate is an action. It tells us what the subject is or what it is doing.
Look at one of the complete sentences examples:
A boy saw an unusual animal in the park.
In this sentence, boy is the subject and saw is the predicate. Boy is a person who is performing an action, and saw is the action that the boy did.
Sentence Fragments and Run-on Sentences
Sometimes a sentence is missing important parts, like the subject or the predicate. We call a sentence like this a sentence fragment.
We can correct sentence fragments by adding the missing information. For example: Is Tom’s favorite subject at school.
This is a sentence fragment because there is not a complete thought. We need to correct it by adding the subject. Now, we have a complete sentence: Math is Tom’s favorite subject at school.
If a sentence has too much information, we call it a run-on sentence.
We can correct run-on sentences in two different ways. We can either add punctuation to separate the sentence into two or more independent thoughts, or join the thoughts together using a conjunction. Take a look at one of the run-on sentences examples:
Tom also likes English and science he used to dislike art now he enjoys it, too.
This is a run-on sentence because there is more than one complete thought that is not connected properly. The first complete thought is Tom also likes English and Science. We can add a period at the end and turn it into the first complete sentence:
Tom also likes English and Science.
Then, we need to capitalize the “h” in “he”: He used to dislike art now he enjoys it, too. The second complete thought is He used to dislike art. We can connect it to the third complete thought now he enjoys it with the help of a conjunction:
He used to dislike art, but now he enjoys it, too.
These thoughts can remain inside the same sentence, because now they are properly connected.
Complete Sentences – Summary
Let’s repeat what we learned about complete sentences.
A sentence is a group of words that have a complete thought. Complete sentences have both a subject and a predicate. If the sentence is missing a subject or a predicate, we call it a sentence fragment. We correct it by adding the missing information. If the sentence has too much information, we call it a run-on sentence. We correct run-on sentences by adding punctuation or a conjunction.
Type | Description |
---|---|
Complete Sentence | has a subject and a predicate |
Sentence Fragment | has either a subject or a predicate; is missing important information |
Run-on Sentence | has too much information |
Now you know how to turn sentence fragments and run-on sentences into complete sentences. For more practice, watch our video and download the complete and run-on sentences' worksheet.
Frequently Asked Questions about Complete Sentences
Transcript Complete Sentences
Complete Sentences "Koko, can you proofread this letter to my Nana?" "Sure, let me look." "This is a very nice letter, but I see you are missing some complete sentences!" A sentence is a word or group of words that have a complete thought. Sentences ALWAYS begin with a capital letter and end with punctuation. A complete sentence MUST have a subject and a predicate. The subject of a sentence is the person, place, or thing that is performing the action of the sentence. In the sentence, 'Pip wrote a letter to his Nana', the subject is Pip. The predicate of a sentence tells what the subject is doing or what the subject is. The predicate of this sentence is ' wrote a letter because it tells what Pip did. If a sentence is missing information, like the subject or a predicate, we call it a sentence fragment. We correct sentence fragments by adding the missing information. If a sentence has too much information, we call it a run-on sentence... and correct it by adding punctuation to separate into two independent thoughts... or join the thoughts together with a conjunction. Let's read through Pip's letter and correct the sentence fragments and run-ons. Dear Nana, It's me, Pip! I hope you are doing well! That I miss you. 'That I miss you ' is not a complete thought, so we need to correct it by adding the missing information. We add the subject to the sentence. Since Pip is writing the letter, the subject would be I and we put it here. The predicate is what Pip wanted to do. He wanted to tell his Nana that he missed her, so we'll add the words I wanted to tell you here. The complete sentence says I wanted to tell you that I miss you! Koko and I are living in a treehouse. Koko is my best friend we go everywhere together have so much fun. This is a run-on sentence because there is more than one complete thought that is not connected properly. The first complete thought is 'Koko is my best friend', so we will put punctuation here. Since a new sentence starts here, we now need to capitalize the
Complete Sentences exercise
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What are the parts of a complete sentence?
HintsA sentence is a group of words that have a complete thought.
SolutionA complete sentence must begin with a capital letter, end with a punctuation mark, and have a subject and predicate.
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Change the sentence fragments to complete sentences.
HintsThis example shows a sentence fragment. This sentence is missing a predicate.
This example shows a complete sentence. This sentence has both a subject and a predicate.
SolutionA sentence fragment can be corrected to a complete sentence by adding the missing information.
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Identify the parts of a complete sentence.
HintsThe bolded sentence is a complete sentence.
A complete sentence has both a subject and a predicate.
- A subject is the person, place, or thing that is performing the action of the sentence.
- A predicate tells us what the subject is doing or what the subject is.
The bolded words in the following examples are subjects.
- Benny goes camping in the mountains.
- Amy went rollerblading with her grandpa.
The bolded words in the following examples are predicates.
- Benny goes camping in the mountains.
- Amy went rollerblading with her grandpa.
SolutionA complete sentence must have a subject and a predicate. A subject is the person, place, or thing that is performing the action of the sentence. A predicate tells us what the subject is doing or what the subject is.
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Determine if the sentence is fragment or complete.
HintsA complete sentence needs both a subject and a predicate.
Are any sentences missing a subject?
SolutionA complete sentence must have a subject and a predicate. A sentence fragment is a sentence that is missing information, like the subject or predicate.
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Identify which option is a complete sentence.
HintsSentences begin with a capital letter and end with punctuation.
SolutionA complete sentence must have a subject and a predicate. A subject is the person, place, or thing that is performing the action of the sentence. A predicate tells us what the subject is doing or what the subject is.
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Identify what each sentence needs in order to be a complete sentence.
HintsA run-on sentence can be corrected by adding a conjunction, such as "and".
A run-on sentence can be corrected by adding punctuation.
SolutionPredicate
- Sara wants to take her puppy to the dog park.
- CeCe wants to plant a garden, so she bought sunflower, tulip, and rose seeds to grow.
- The family was so excited to celebrate together! It was Grandma's 96th birthday!
- Benny is going kayaking. He will need to bring his sunscreen and sunglasses.
- They all yelled, "Surprise!" when Grandma walked into the room.
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