mọi người ơi cho mình hỏi khi nào dùng to have khi nào dùng to V ạ ( đối với dạng bt câu bị động không ngôi ) ạ 

1. They believe that Jim is going to study abroad.    

2. People rumored that there was a ghost in that house.

3. Someone said that Jane would be able to win the contest.

4. They claimed that everything they said was true.           

5. They reported that there was a serious accident on the main road.

6. They don’t think that this camera costs that much.

7. Did they claim that they had managed to solve the problem?

8. People didn’t expect that the building collapsed after the storm 
 Một số câu này mình đg rối ko bt lúc nào dùng to have hay to v ạ mn có thể chỉ ra câu nào to have hay to v và vì sao đc ko ạ . Help với hiccc

1. Although Nam is not an intelligent student, he can learn very fast.

=> Despite/ In spite of not being an intelligent student, Nam can learn very fast

2. Because Hoa was rich, she could buy that house.

=> Because of Hoa's richness,she could buy that house.
Mn ơi sao câu 2 mình ko dùng V-ing mà dùng N ạ với làm sao biết khi nào dùng V-ing hay N cho mỗi câu ạ