grammar work

1. (+)When we came back home, the children had already been sleeping for two hours
    (-) Children hadn't been already sleeping for two hours
    (?)Had children already sleeping when we get home?
2.(+)Tina had just been getting home when I phoned her
   (-)Tina hadn't just been getting home when I phoned her
   (?)Had Tina just been getting home when I phoned her?
3 (+)I was glad to meet ted again. I had seen him for ages
   (-)I was glad to meet ted again. I hadn't seen him for
   (?)Was I glad to meet Ted?