Uso del pasado del verbo TO BE

Recordemos el presente del verbo TO BE.
I AM. YO SOY/ESTOY
YOU ARE
HE IS
SHE IS
IT IS
WE ARE
YOU ARE
THEY ARE

EL PASADO DEL VERBO TO BE.
I WAS. YO ERA/ESTABA
YOU WERE
HE WAS
SHE WAS
IT WAS
WE WERE
YOU WERE
THEY WERE

EJEMPLO
El es un profesor.
HE IS A TEACHER. HE WAS A TEACHER.
I AM FELIX. I WAS CLAUDIA.
YOU ARE A STUDENT. YOU WERE A STUDENT.
THEY ARE FIVE BROTHERS. THEY WERE FIVE BROTHERS.
SHE IS AN ENGINEER. SHE WAS AN ENGINEER.

HW. TUESDAY, 5TH MAY 2015
REPASA LOS APUNTES.
HACED EN LA LIBRETA EXERCISE 3, PAGE 37 PB.