A period comes before an ellipsis if it follows a complete sentence. Compare the following ... I know, I know. We grammar types lecture you all the time about how one luau plus another luau ...

When combining two complete sentences with a conjunction ("and," "but," "or," "for," or "yet"), precede the conjunction with a comma. Example: Still, the sun is slowly getting brighter and hotter, and ...

Semicolons must combine similar elements and are either used to combine complete sentences or items in a long, complicated list. Use semicolons in the following situations: Combine two complete ...

started National Grammar Day in 2008. Since then it has been held every year on March 4th, a date that also happens to be a complete sentence (March forth!). It is celebrated in various ways ...

I'm using it in this sentence, which I'm not quite sure how to ... But if you want to really impress your grammar-freak friends ... when it follows a grammatically complete sentence.

A run‐on sentence is two or more independent clauses joined together with insufficient punctuation. This means that there are two or more complete sentences fused into one sentence. Use a colon: a ...