My grandfather ... very handsome when he ... 20 years old
My grandfather was very handsome when he was 20 years old
We... at my home last night
We were at my house last night
she ... a dancer 10 years ago
She was a dancer 10 years ago
I ... not a firefighter
I am not a firefighter
... you a nurse?
Are you a nurse?
... we at school yesterday?
were we at school yesterday?
She ... a model
She is a model
Mi friend Tom ... not in New York last summer
Mi friend Tom was not in New York last summer
Look! It ... a clock
It is a clock
I ... a student
I am a student