Afirmativ:
I/he/she/it was studying when she called.
You/we/they were studying when she called.
Interogativ:
Was I/he/she/it studying when she called?
Were you/we/they studying when she called?
Negativ:
You/we/they were not studying when she called.
I/he/she/it was not studying when she called.
COROANA?