Rules for Good Grammar #4. 1: Don't use no double negatives. 2: Make each pronoun agree with their antecedents. 3: Join clauses good, like a conjunction should. 4: About them sentence fragments. 5: When dangling, watch your participles. 6: Verbs has got to agree with their subjects. 7: Just between you and i, case is important. 8: Don't write run-on sentences when they are hard to read. 9: Don't use commas, which aren't necessary. 10: Try to not ever split infinitives. 11: It is important to use your apostrophe's correctly. 12: Proofread your writing to see if you any words out. 13: Correct speling is essential. 14: A preposition is something you never end a sentence with. 15: While a transcendent vocabulary is laudable, one must be eternally careful so that the calculated objective of communication does not become ensconced in obscurity. In other words, eschew obfuscation.