Run-ons, Comma Splices, and Fused Sentences are some of the most common grammatical errors that students make in their papers. Purdue’s OWL site gives a great explanation of these errors.
Join sentences (independent clauses) with a semicolon (;) or with a coordinating conjunction AND a comma. If you leave out the coordinating conjunction, you have a comma splice. If you leave out the comma, you have a run-on sentence.
Luckily, there are only seven coordinating conjunctions to remember:
Note: a comma AND a coordinating conjunction join each of the following compound sentences:
I went swimming, and John went swimming, too.
We could go to the beach, or we could go to the mountains.
I miss having a cat, but I don’t mind not having a litter box.
We should bring Paul on the trip, for he can read maps really well.
Neither of us can sing, nor can we dance.
I have made up these sentences, so you will learn to punctuate correctly.
You may not have know about coordinating conjunctions before, yet I hope you will not forget them now.