Here's how it works:
* Present participle: This is formed by adding "-ing" to the base form of the verb. For example, the present participle of "walk" is "walking".
* Progressive tense: This tense describes an action that is ongoing or in progress. It uses the auxiliary verb "be" (am, is, are, was, were, being, been) followed by the present participle.
Examples:
* Present progressive: "I am walking to the store."
* Past progressive: "She was walking to the park."
* Future progressive: "They will be walking in the parade."