Para mi clase de literatura tengo que leer dos libros.
Explanation:
Para mi clase de literatura tengo que leer dos libros. This means: For my literature class I have to read two books. "Tengo" comes from the verb "tener" and it is the first person singular of the present form. The verb must be in the first person because the "mi clase" (my class) implies it's a personal statement. That's why tienes, tiene y tienen are incorrect.
