The verb ser, meaning to be, has peculiar verb forms. In this lesson, you'll learn those different forms framed against its partner verb, estar, which also means to be. After practicing this lesson's helpful drills, you'll know when to use ser and when to use estar. We'll also practice Strategy 4 using the verb tener, which means to have, and we'll learn some extended verb forms. After this lesson, you'll know all there is to know about Strategies 1 through 4!