Verb forms are variations of a verb that express different tenses, moods, or aspects. The main forms include the base form (e.g., run), the past form (e.g., ran), and the past participle (e.g., run). These forms help indicate when an action occurs, such as in the present, past, or future. In addition to these basic forms, verbs can also take on different endings to show tense. For example, adding “-ing” creates the present participle (e.g., running), while adding “-ed” typically forms the regular past tense (e.g., played). Understanding verb forms is essential for constructing clear and accurate sentences.