Fused or Run-On Sentence
A fused sentence is sometimes called a run-on sentence. The concept is simple. If your teacher marks fused sentence or run-on on your paper, it’s because you have put two complete thoughts or independent clauses together without the proper punctuation or any kind of sentence boundary. Here is an example:
And, here is the corrected sentence:
The key is to remember that you must have some kind of boundary between your independent clauses. You can use punctuation, such as the period or the semicolon, or you can use a comma with a coordinating conjunction (and, but, or, for, nor, so, yet).