1. They didn`t collect postcards last year.
Did they collect postcards last year?
Who collected postcards last year?
What did they collect last year?
When did they collect postcards?
Did they collect postcards or stamps last year?
They collected postcards last year,didn`t they?
2. Fiona didn`t sing a song yesterday evening.
Did Fiona sing a song yesterday evening?
Fiona sang a song yesterday evening,didn`t she?
Who sang a song yesterday evening?
What did Fiona sing yesterday evening?
When did Fiona sing a song ?
Did Fiona sing a song yesterday evening or yesterday afternoon?
3. They didn`t buy a few souvenirs last summer.
They bought a few souvenirs last summer,didn`t they?
Did they buy a few souvenirs last summer?
Who bought a few souvenirs last summer?
What did they buy last summer?
When did they buy a few souvenirs ?
Did they buy a few souvenirs last summer or last autumn?