To have to....= Tener que....
(I) have to....= Tengo que....
You (singular, informal) have to....= Tienes que....
You (singular, formal) have to.... = Usted tiene que....
You (plural, informal) have to.... = Teneis que....
You (plural, formal)/they have to.... = Tienen que....
We have to.... = Tenemos que....