When you use it
Check for these three errors when you edit your writing or punctuate sentences. A fragment is incomplete, a run-on joins two independent clauses with nothing, and a comma splice joins them with only a comma.
Watch out
A comma alone cannot join two independent clauses: The doctor performed the operation, the patient died is wrong. Join them with a semicolon, or with a coordinating connector such as and, but, or, nor, for or yet. A group of words starting with Since or Although and having no main clause is still a fragment.
Drafted from Grade 11 English, pages 1-32, then checked twice before it went up