1)One common error that writers make is the run-on, however, this mistake can be corrected if writers know the following grammar rules. 2) Never combine two sentences with a comma only, this is one way that a run-on is created. 3) Secondly, two sentences should not be run together without any punctuation this also creates a run-on. 4) One option that writers can use to properly combine two sentences is the comma and a coordinating conjunction, such as and, but, or, for, yet, nor, or so. 5) Another option is the semicolon; it can be used to combine two sentences. 6) The third possibility is to use a semicolon, a conjunctive adverb, and a comma. 7) Examples of conjunctive adverbs include however, moreover, nevertheless, as a result, consequently, and furthermore; there are many more. 8) Students can also combine two sentences by making one sentence dependent upon the other; moreover, this option is a nice way to vary sentence patterns, creating variety in writing. 9) The following sentences can be used to illustrate this concept they are good clear examples: 10) Jaramias loved the ballet he attended many of the performances at UNM's main campus. 11) In this sentence, the mistake appears between ballet and he; these two should not be run together without using any punctuation. 12) A writer can add because to the first sentence and place a comma after ballet: Because Jaramias loved the ballet, he attended many of the performances at UNM's main campus. 13) Any of the four methods a writer chooses is correct, however, he or she should use all four throughout a paper to create sentence variety. 14) When writing in-class, writers allow at least ten minutes to edit the paper they should check each sentence to make sure that they have not created a run-on. 15) When word processing a document, grammar check will often help a writer catch this error, but the writer should not depend on it to catch them all, nothing replaces a close, careful reading.