bantu aku donk, buat 3 contoh kalimat past perfect continuous tense

Rumus : 
(+) S + had + been + Ving
(-) S + had + not + been + Ving
(?) Had + S + been + Ving

contoh :
(+) She had been reading that book before i came.
(-) She had not been reading that book before i came
(?) Had she been reading that book before i came?

cmiiw

1. I have been listening to the song since this morning.
2. Amy has been looking for her missing puppy since yesterday.
3. Thomas has been making plans about his holiday vacation since a week
    ago.

Semoga Membantu ^^