Rules of the Grammar Nazi:
1. A sentence must be properly punctuated. No commas without periods, no periods without commas, no semicolons without colons.
2. Subjects and verbs must be agreed. A subject must be a noun or pronoun, and a verb must be a verb.
3. Clauses must be well-formed. No dangling modifiers, no run-on sentences.
Want to know more? Examples of proper and improper grammar