This document provides an explanation of the differences between the words "like" and "as" in English. It outlines five main uses: 1. "As" is used to mean "in the same way" and is followed by a subject and verb, while "like" is more casual. 2. "As" is used in comparisons of equality and inferiority. 3. "Such as" can replace "like" when giving examples. 4. "As" is used as a preposition to indicate a person's job or profession. 5. "As" is used in certain expressions like "as you know" or "as expected."