his, her, your, or their teacher
El estudiante se rehusó a obedecer a su profesor.
The student refused to obey his teacher.
A los niños no les gustó su profesor.
The children did not like their teacher.
Siempre se está quejando de su profesor.
He’s always complaining about his teacher.
Ellos esperaron a su profesor.
They waited for their teacher.
Ella se enamoró de su profesor.
She fell in love with her teacher.
Their teacher praised them.
Que fuiste su profesor de secundaria.
That you were his high school teacher.
Tom se inclinó ante su profesor.
Tom bowed to his teacher.