past forms - proszę o pomoc

Bardzo proszę o sprawdzenie tych zdań:

1. We HAD BEEN DISCUSSING it almost for half an hour when Peter CAME and SAID that Jude HD ALREADY REFUSED to support our plan.
2. He COULDN'T believe it when I said I HAD LIVED in Poland for 20 years and HADN'T SEEN Warsaw by then.
3. I had no idea what Fiona HAD BEEN DOING since three o'clock.
4. I HAD BEEN KNITTING the pullover for a week when I DECIDED to change the pattern.
5. George HAD BEEN CARRYING the suitcase for a few minutes when he ASKED me to give him a hand.
6. My teacher WAS DISAPPOINTED when he LEARNED that I HAD BEEN DOING these exercises for 2 hours and had managed to do only 6 of them.
7. When I CAME home at seven I FOUND OUT that the children HAD BEEN PLAYING in the garden since 4 o'clock and that my wife HADN'T COME home form the office by then.
8. My wife asked me how long I HAD BEEN TRYING to change the bulb.
10. I LIVED in Lisbon for 10 years and then I moved to Porto.
11. I HAD BEEN LIVING in Lisbon for 10 years when you visited me for the first time.
12. I WAS LIVING in Lisbon when The Second WW broke out.
13. Tom and I HAD BEEN married for 3 years and a half when our first child was born.
14. When Grace ENTERED the bathroom she REALISED someone HAD BEEN USING her towel because it was wet.
15. The room was bright as my husband HAD PAINTED it white.
16. Kate LOOKED very upset as she HAD FILED d her final exam.
17. I ENTERED the room, OPENED the window, LOOKED out of it and SAW your cat in the street.
18.The police HAD BEEN FOLLOWING him since the very moment they HAD STARTED to suspect him.

>1. We HAD BEEN DISCUSSING it FOR almost half an hour when Peter CAME
>and SAID that Jude HaD ALREADY REFUSED to support our plan.
>2. He COULDN'T believe it when I said I HAD LIVED in Poland for 20
>years and HADN'T SEEN Warsaw by then.
>3. I had no idea what Fiona HAD BEEN DOING since three o'clock.
>4. I HAD BEEN KNITTING the pullover for a week when I DECIDED to
>change the pattern.
>5. George HAD BEEN CARRYING the suitcase for a few minutes when he
>ASKED me to give him a hand.
>6. My teacher WAS DISAPPOINTED when he LEARNED that I HAD BEEN DOING
>these exercises for 2 hours and had managed to do only 6 of them.
>7. When I CAME home at seven I FOUND OUT that the children HAD BEEN
>PLAYING in the garden since 4 o'clock and that my wife HADN'T COME
>home from the office by then.
>8. My wife asked me how long I HAD BEEN TRYING to change the bulb.
>10. I had LIVED in Lisbon for 10 years and then I moved to Porto.
>11. I HAD BEEN LIVING in Lisbon for 10 years when you visited me for
>the first time.
>12. I WAS LIVING in Lisbon when The Second WW broke out.
>13. Tom and I HAD BEEN married for 3 years and a half when our first
>child was born.
>14. When Grace ENTERED the bathroom she REALISED someone HAD BEEN
>USING her towel because it was wet.
>15. The room was bright as my husband HAD PAINTED it white.
>16. Kate LOOKED very upset as she HAD FaILED her final exam.
>17. I ENTERED the room, OPENED the window, LOOKED out of it and SAW
>your cat in the street.
>18.The police HAD BEEN FOLLOWING (tutaj moim zdaniem może być Present Perfect Cont, bo nie do konca wiadomo czy ta czynnosc się skonczyła - Have beeb following). him since the very moment they HAD
>STARTED (STARTED - jesli tam Present Perf Con to tutaj Past Simple) to suspect him.

Dziękuję!:)
Mam tylko pytanie - dlaczego w zdaniu nr 10 powinno być "HAD lived"? Nie może zostać po prostu LIVED, jeśli te 2 czynności zostały wykonane po sobie? Myślałam, że tak jest dobrze, bo wystąpiło "THEN" w zdaniu...

10. I LIVED in Lisbon for 10 years and then I moved to Porto.

ponieważ mieszkałaś w Lizbonie przed tym jak przeprowadziłaś się do Porto

w 10 powinien byc simple past (I lived)
To zdanie wyraza zwykla liniowa narracje, punkt odniesienia to najpierw pobyt w Lizbonie, a potem w Parzyu.
Past Perfect mialby uzasadnienie, gdyby punktem odniesienia byl pobyt w Paryzu, np.
Before I moved to Paris, I had lived in Lisbon for 10 years.