I am seven.
I wasn't seven last year.
My mother is from Russia.
My mother wasn't in Britain last year.
People are at the stadium.
People weren't at the stadium last week.
My sister is good at skating
My sister wasn't good at skating last year.
The books are on the table.
The books weren't on the table yesterday.
Is your father in Moscow?
Was your father in Moscow last month?
Is your mother in Britain? ----Yes, she is.
Was your mother in Britain last year?- Yes, she was.
Are your sisters at home? -No, they aren't.
Were your sisters at home yesterday? - No, they weren't.