Sentence errors are identified as follow:

1. Sentence fragment

A type of sentence error known as sentence fragment is a group of words that used together does not form a complete sentence ; it is just a part of a sentence that doesn’t express a complete idea. It occurs when an incomplete sentence is presented as a complete sentence, such as letting a phrase or a dependent clause (subordinate clause) to stand on its own as though it is a complete sentence.

A phrase is a group of two, three or more words that does not contain a subject or verb and it becomes a sentence fragment when it is allowed to stand alone . The same happens to a dependent clause although it has a subject and verb. It must be connected to an independent clause to form a complete sentence.

A phrase is a sentence fragment if it stands on its own . To turn them into complete sentences, add subjects and verbs.

Examples:

  • Noun phrase : The dotted line. (Fragment)
  • Complete sentence : She signed on the dotted line.
  • Prepositional phrase : Into a briefcase. (Fragment)
  • Complete sentence : He stuffed  a few documents into a briefcase.  Â

The following examples show subordinate clauses (dependent clauses) being used as though they are complete sentences. A subordinate clause always begins with a subordinating conjunction (because, when, etc.).

When a subordinating conjunction is dropped from a subordinate clause, the clause becomes a complete sentence . These examples show the subordinate clauses joined to main clauses to form complete sentences.

Examples:

  • Subordinate clause : When we have no money. ( Sentence fragment )
  • Complete sentence : We have no money. (Conjunction  when  is dropped.)
  • Complete sentence : We can’t buy a yacht when we have no money. (Add an independent clause to the sentence fragment to produce a complete sentence.)  
  • Subordinate clause : Because she was the best candidate. (Sentence fragment)
  • Complete sentence : She was the best candidate. (Conjunction  because  is dropped.)
  • Complete sentence : She got the job because she was the best candidate. Â
  • Subordinate clause : Since ten o’clock this morning. (Fragment)
  • Complete sentence : I’ve been here since ten o’clock this morning.

2. Run-on sentence, comma splice, fused sentence.

A  run-on sentence  is one that contains two independent clauses that are not properly connected by punctuation or appropriate conjunction. It is also called fused sentence .

A  comma splice  results when two independent clauses are improperly joined with a comma.

A  fused sentence  is also called a run-on sentence. It is a sentence of two or more main clauses that are not properly joined by a punctuation mark such as a semicolon or a conjunction.

Correction of comma splice sentences.

There four ways the following splice sentences are corrected.  Â
 

Examples:

Splice sentences : separating two independent clauses with a comma

  • Julia began her prison sentence, she refused to wear prison clothes.

  • The emperor wants the magic golden sword, you must deliver it to the emperor yourself.

  • Let’s not go into that cave, I heard it’s full of ghosts.

  • I don't want to fly kite like you do, I won't.

Examples:

1. Separate the clauses into individual sentences by replacing the commas with full-stops.

  • Julia began her prison sentence.  She refused to wear prison clothes. .
  • The emperor wants the magic golden sword. You must deliver it to the emperor yourself. 
  • Let’s not go into that cave. I heard it’s full of ghosts. Â
  • I don't want to fly kite like you do. I won't.

2. Use a comma and coordinating conjunction between clauses to form a compound sentence.

  • Julia began her prison sentence, but she refused to wear prison clothes.
  • The emperor wants the magic golden sword, and you must deliver it to the emperor yourself. 
  • Let’s not go into that cave, for I heard it’s full of ghosts. Â
  • I don't want to fly kite like you do, so I won't.

3. Use a semicolon between the clauses.

  • Julia began her prison sentence; she refused to wear prison clothes.  Â
  • The emperor wants the magic golden sword; you must deliver it to the emperor yourself.
  • Let’s not go into that cave; I heard it’s full of ghosts. .
  • I don't want to fly kite like you do; I won't.  Â

4. Make one clause a subordinate clause to the other to form a complex sentence.

  • When Julia began her prison sentence, she refused to wear prison clothes.  Â
  • As the emperor wants the magic golden sword, you must deliver it to the emperor yourself. 
  • Let’s not go into that cave because I heard it’s full of ghosts. Â
  • Since I don't want to fly kite like you do, I won't.

Correction of fused sentences.

Fused sentences are corrected in the same ways as those for comma splice sentences.

Examples:

Fused sentence : Grandfather is almost 80 years old he is losing his hair.

1.     Separate the clauses into individual clauses. Â

Grandfather is almost 80 years old. He is losing his hair.  

2.    Use a comma and coordinating conjunction between clauses to form a compound sentence.  Â

Grandfather is almost 80 years old, and he is losing his hair.  

3.     Use a semicolon between the clauses.  Â

Grandfather is almost 80 years old; he is losing his hair.  

4.    Make one clause a subordinate clause to the other to form a complex sentence.  Â

Since grandfather is almost 80 years old, he is losing his hair.  Â