Common Sentence Errors

Fragments often occur because of some common error, such as starting a sentence with a preposition, a dependent word, an infinitive, or a gerund. If you use the six basic sentence patterns when you write, you should be able to avoid these errors and thus avoid writing fragments.

When you see a preposition, check to see that it is part of a sentence containing a subject and a verb. If it is not connected to a complete sentence, it is a fragment, and you will need to fix this type of fragment by combining it with another sentence. You can add the prepositional phrase to the end of the sentence. If you add it to the beginning of the other sentence, insert a comma after the prepositional phrase.

Figure 1.2 Editing Fragments That Begin with a Preposition

Example A

Example B

Clauses that start with a dependent word—such as since, because, without, or unless—are similar to prepositional phrases. Like prepositional phrases, these clauses can be fragments if they are not connected to an independent clause containing a subject and a verb. To fix the problem, you can add such a fragment to the beginning or end of a sentence. If the fragment is added at the beginning of a sentence, add a comma.

When you encounter a word ending in -ing in a sentence, identify whether or not this word is used as a verb in the sentence. You may also look for a helping verb. If the word is not used as a verb or if no helping verb is used with the -ing verb form, the verb is being used as a noun. An -ing verb form used as a noun is called a gerund.

Once you know whether the -ing word is acting as a noun or a verb, look at the rest of the sentence. Does the entire sentence make sense on its own? If not, what you are looking at is a fragment. You will need to either add the parts of speech that are missing or combine the fragment with a nearby sentence.

Figure 1.3 Editing Fragments That Begin with Gerunds

Incorrect: Taking deep breaths. Saul prepared for his presentation.

Correct: Taking deep breaths, Saul prepared for his presentation.

Correct: Saul prepared for his presentation. He was taking deep breaths.

Incorrect: Congratulating the entire team. Sarah raised her glass to toast their success.

Correct: She was congratulating the entire team. Sarah raised her glass to toast their success.

Correct: Congratulating the entire team, Sarah raised her glass to toast their success.

Another error in sentence construction is a fragment that begins with an infinitive. An infinitive is a verb paired with the word to; for example, to run, to write, or to reach. Although infinitives are verbs, they can be used as nouns, adjectives, or adverbs. You can correct a fragment that begins with an infinitive by either combining it with another sentence or adding the parts of speech that are missing.

Incorrect: We needed to make three hundred more paper cranes. To reach the one thousand mark.

Correct: We needed to make three hundred more paper cranes to reach the one thousand mark.

Correct: We needed to make three hundred more paper cranes. We wanted to reach the one thousand mark.

Run-on Sentences

Just as short, incomplete sentences can be problematic, lengthy sentences can be problematic too. Sentences with two or more independent clauses that have been incorrectly combined are known as run-on sentences. A run-on sentence may be either a fused sentence or a comma splice.

Fused sentence: A family of foxes lived under our shed young foxes played all over the yard.

Comma splice: We looked outside, the kids were hopping on the trampoline.

When two complete sentences are combined into one without any punctuation, the result is a fused sentence. When two complete sentences are joined by a comma, the result is a comma splice. Both errors can easily be fixed.

Punctuation

One way to correct run-on sentences is to correct the punctuation. For example, adding a period will correct the run-on by creating two separate sentences.

Using a semicolon between the two complete sentences will also correct the error. A semicolon allows you to keep the two closely related ideas together in one sentence. When you punctuate with a semicolon, make sure that both parts of the sentence are independent clauses. For more information on semicolons, see Section 1.4.2 “Capitalize Proper Nouns”.

Run-on: The accident closed both lanes of traffic we waited an hour for the wreckage to be cleared.

Complete sentence: The accident closed both lanes of traffic; we waited an hour for the wreckage to be cleared.

When you use a semicolon to separate two independent clauses, you may wish to add a transition word to show the connection between the two thoughts. After the semicolon, add the transition word and follow it with a comma. For more information on transition words, see Chapter 7 “The Writing Process: How Do I Begin?”.

Run-on: The project was put on hold we didn’t have time to slow down, so we kept working.

Complete sentence: The project was put on hold; however, we didn’t have time to slow down, so we kept working.