Using the Phrase "Tener que"

One of the most useful phrases you’ll ever know in Spanish is the grammatical clause tener que, which when coupled with a verb in the infinitive means “to have to” + verb.  

Tengo que estudiar.  I have to study.

¿Tienes que escribir un ensayo?  Do you have to write an essay?

Ella tiene que cantar.  She has to sing. 

Tenemos que ir.  We have to go. 

Tienen que leer un libro.  They have to read a book.