This site gives a very clear explanation of a gerund and its noun qualities. This resource explains how to use the possessive case with a gerund. A quiz is provided to check understanding of this concept.

This instructional activity focuses on recognizing and demonstrating the standard use of apostrophes when using both singular and plural. It also provides a practice exercise.

Are you confused about how to express separate or joint ownership? This tutorial offers examples and explanations about which constructions are correct. A brief quiz checks your understanding.

In this writing and grammar tutorial, learn how to distinguish and use nouns and pronouns in English and whether they are subjective, nominative, possessive, or objective.

This site focuses on the three uses for apostrophes: forming possessives of nouns, forming plurals of lowercase letters, and showing omission of letters and provides examples of each.

Discusses the two main functions of apostrophes: contractions and forming possessives.

English for Everyone provides a printable quiz to assess the words associated with family relationships, jobs, places, and human body.

Detailed description of the June 1917 Battle of Ortigara that took place between the Italian and Austro-Hungarian armies for possession of Mount Ortigara.