Answer:
1. "I have cleaned the room", he said.
→ He said that he had cleaned the room.
2. Sam is sick, so she can't come to the party tonight.
→ If Sam was sick then he couldn't came to the party tonight.
3. Because it was raining, we didn't go camping
→ Because of rain we does not go camping.
4. Despite playing very well, they didn't win the tournament.
â–º Although they were playing very well they doesnot won the game.
Explanation:
not too much sure