Без to be
Present Simple
I
study English every day.
I don’t
study English every day.
Does
he study English every day?
Past Simple
We
studied English yesterday.
They
didn’t study English 2 days ago.
Did
she study English last year?
С to be
Present
Simple
I am a
student.
He isn’t
a student.
Are
they students?
Past Simple
I was
a student last year.
He
wasn’t a student 2 years ago.
Were
they students last month?