This grammar rule doesn't have to be confusing! Our easy-to-follow guide explains the rules for using an apostrophe—and when to avoid one.

English usage, including grammar, spelling, and punctuation conventions, is full of contradictions, exceptions, and rules that we probably know implicitly but have probably never really thought ...

One of the earliest and most useful grammar rules in English is that a verb should always agree with its subject in both person and number.

Grammar columnist and expert June Casagrande describes when you should add an apostrophe to plural words in writing.

Before you slip that letter into the mail, find out how to properly write plural last names. Here, etiquette and grammar experts explain.

A report published today in the journal Science indicates that although monkeys can grasp basic grammar rules, they are unable to understand the more complex rules that are central to human language.