Are these sentences correct:
1-The animal which caused us a lot of trouble to trap is in that cage.
2-The animal whose trapping caused us a lot of trouble is in that cage.
3-The animal that was very troublesome to trap is in that cage.
4-The man who caused us a lot of trouble to arrest is innocent.
5-The man whose arresting caused us a lot of trouble is innocent.
6-The man that was very troublesome to arrest is innocent.
I was trying out various ways to say things and I think I managed to get myself really confused. I think 3 & 6 are correct. I don't think one would use 2 & 4, but they seem logically fine to me. As for 1 & 4, I am not sure they mean anything.... But at this stage, I am not sure of anything!!