Here's how verb forms change:
* Third-person singular present tense: This is the only time verbs change form to reflect the subject. For most verbs, you add "-s" or "-es" to the base form when the subject is a third-person singular noun (he, she, it, or a singular noun like "the cat").
* Example: "He walks to school" vs. "They walk to school."
* Other tenses: All other tenses (past tense, present continuous, future, etc.) have the same form regardless of whether the subject is singular or plural.
* Example: "She walked to school" vs. "They walked to school."
Let me know if you'd like more detail on how verb forms change depending on tense!