3) Mr. and Mrs. Smith hadn't vistited their close friend last month. (-)
Who has Mr. and Mrs. Smith visited last month? (?)
Has Mr. and Mrs. Smith visited their friends last month? (?)
4) It hasn't snown a lot last winter. (-)
Has it snown a lot last winter? (?)
When has it snown a lot? (?)
5) I haven't slept three hours last night. (-)
Have I slept three hours lat night? (?)
When have i slept for three hours? (?)
6) We haven't decorated the dining room for Christmas Eve. (-)
Have we decorated the dining room for Christmas Eve? (?)
Why have we decorated the dining room? (?)
