Was the ice cream delicious?
Yes, it was.
Was Tom sick?
Yes, he was.
Was Kate at the hospital yesterday?
No, she wasn't.
Were the children at home yesterday?
Yes, they were.
Was Janet thirsty?
Yes, she was.
Was Alex sad?
No, he wasn't.
Was the cake delicious?
No, it wasn't.
Were the children at the library yesterday?
No, they weren't.