1. "run" is a verb that serves as the main predicate in a sentence. For example: "I run every day."2. "running" can be a present participle or a gerund. As a present participle, it indicates an ongoing action, as in "I am running." As a gerund, it functions as a noun, as in "I like running."3. "likes" is the third-person singular present tense form of "like." It is used after pronouns such as "he," "she," or "it." For example: "I like reading books." (original form) versus "He likes reading books." (third-person singular form)