The Sentence Fragment, Run On Sentence And Compound Sentence

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Fix A Sentence Fragment

It is easy to correct a sentence fragment or a run on sentence

Finding a solution is simple, once you can recognise what the problem is with a sentence.

When you write in a hurry, there will always be corrections that you will need to make.

One area you should pay careful attention to when proofreading or grammar checking is how you structure a short or a long sentence in your text.

In a well-formed sentence, you express a complete thought that should make perfect sense to your reader. The basic rule of a complete sentence is that it is a group of words that contains a subject and verb.

Simple sentences usually have a subject and a verb plus an object. For example, I walk my dog.

In complex sentences or compound sentences, you can use many devices.

These include defining and non-defining clauses, coordinating conjunctions, dependent clauses, independent clauses and punctuation such as commas or even semicolons.

Of course, making sure that all the clauses are joined correctly and in the right order is what good writing is all about.

The most common problems with sentence structure are fragmented sentences, run on sentences, comma splices and fused sentences.


1. What is a sentence fragment?

sentence fragment

The usual causes of this error are that the sentence is lacking a subject or verb or there is a separated prepositional phrase or dependent clause.

Look for the following errors when revising the fragment in your sentences to make sure the sentence is complete.


Sentence fragment examples


Lacks a subject

Looking forward to meeting you on Saturday. Incorrect

I’m looking forward to meeting you on Saturday. Correct


He was scared. Running in fear towards the forest. Incorrect

He was scared and ran in fear towards the forest. Correct


There is no verb

It was Christmas. A time of merriment and joy. Incorrect

It was Christmas and a time of merriment and joy. Correct


I found a great new job. The remedy for all my financial problems. Incorrect

I found a great new job, which will be the remedy for all my financial problems. Correct


Separated prepositional phrase

We had a great time. In spite of the rain. Incorrect

In spite of the rain, we had a great time. Correct


He lived in Rome. For many years. Incorrect

He lived in Rome for many years. Correct


Dependent clause fragment

She stood in the pouring rain. Waiting for her bus to arrive. Incorrect

She stood in the pouring rain waiting for her bus to arrive. Correct


John ran quickly to his office. To be sure he was on time. Incorrect

To be sure he was on time, John ran quickly to his office. Correct


2. What is a run on sentence?

Run On Sentence

A run on sentence is also called a fused sentence.

This mistake occurs when two independent clauses, which are in fact complete sentences, are joined together without being correctly connected. Clauses that are not separated correctly can create confusion for a reader.

Conjunctions like and, but, for, nor, yet, or, so can often fix the problem.

Using a subordinating conjunction like after, although, as and because is another way to join two clauses correctly and create a second subordinating clause.

Adding a conjunctive adverb such as however, moreover, therefore or nevertheless can also be used as a solution.

Another form of a run on sentence is called a comma splice. It happens when a comma joins two independent clauses. The solution to this problem is usually to separate them into two sentences and add a capital letter.


Run on sentence examples


The next phase will be more difficult, you should get ready as soon as you can. Incorrect

The next phase will be more difficult so you should get ready as soon as you can. Correct


I can’t figure out how to set up this router, it came without an instruction manual. Incorrect

I can’t figure out how to set up this router because it came without an instruction manual. Correct


We’ll go to the cinema, then we’re going to have dinner. Incorrect

We’ll go to the cinema and then we’re going to have dinner. Correct

We’ll go to the cinema. Then we’re going to have dinner. Correct


The taxi didn’t arrive, therefore, we had to walk home. Incorrect

The taxi didn’t arrive. Therefore, we had to walk home. Correct

We had to walk home because the taxi didn’t arrive. Correct


3. What is a compound sentence?

compound sentence

There are three types.

A compound sentence consists of at least two independent clauses.

However, a complex sentence consists of an independent clause and at least one additional dependent clause.

Mixing these two form together creates a compound-complex sentence.


Compound sentence examples

I ran out of money, so I had to cut short my vacation.

I wanted to go to work, but I was just too sick.

She hasn’t been to New York, nor has she been to Los Angeles.

Judy hates going to the dentist, but she went for her check up on Monday.


Complex sentence examples

Apple has posted huge profits since it released the iPhone.

Although Mary was nervous, she passed her driving test.

Because I was running late, I grabbed a sandwich to eat on the way.

Although it was fun, I was really tired when it finished.

I’ll keep this old phone in case I need it one day.


Compound-complex examples

Even if Tom like skiing, he doesn’t go very often because it is too expensive.

Mike forgot to buy a birthday present for his wife, so he gave her a gift card, which she spent very quickly.

I was saddened to learn that my friend’s mother, who was only fifty-three, had passed away after a long illness.



When you want to write with clarity, keeping your sentences short and simple is the easiest way to do so. It is a formula that is used a lot in article and blog writing.

However, in fiction, painting a scene requires longer and more complex sentence structures. By doing so, the chances of making a few errors increases.

If you are unsure, using a good grammar checker like Grammarly or for authors, Prowritingaid can help you find problems in your sentence structures and then you can repair them quite easily.

But the examples I have listed in this article should help you recognise the different sentence types.

Understanding the differences between these basic structures will help you write better and more accurately.


More reading: The Best Free Online Grammar Checkers


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Derek Haines

Derek Haines is an Australian author, living in Switzerland.

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