I want to ask why the words "all of us" and "all of us" in these two sentences are different. Thank you!

These two sentences have the same meaning. The first sentence is active voice, which means "his joke made us all laugh". The following sentence is in the passive voice, meaning "We were all made laugh." .

"All of us" can be used in two ways: as subject and object.

Subject: All of us.

(His joke) made us all laugh. ? We are all very happy. (passive voice)

(His joke) made us all laugh. ?

2.？ Object: all of us = all of us

His jokes made us all laugh His jokes made us all laugh

His jokes made us all laugh

When all of us are treated as an object, it becomes all of us. They are synonyms, meaning "we are all", and they can all be objects.

Because us is an object pronoun, it is used as an object. all in us all is a pronoun and an appositive of us.