Hello. 1a. He lives in the house. b. The house is lived in by him. 2a. Tom laughed at Jerry. b. Jerry was laughed at by Tom. 3a. We arrived at the hospital. b. The hospital was arrived at by us. 4a. Tom depends on Jerry. b. Jerry is depended on by Tom. The (b) version is the passive of 'intransitive verb + prepositon'. Are (b) version all grammatically correct? If some are correct, some are not, does this just depend on the linguistic habits? Thank you always~.