Hi Aleli
Hope things are well with you. I �m getting ready for school...just today & tomorrow then 2weeks of holiday!
The verb complain takes the preposition about.
After prepositions we always use a gerund = playing
Now if we say Iverson complained about playing again on Wednesday. without "his"
means that Iverson is referring to himself, so both the original sentence and the sentence above are correct.
If you want to say that Iverson complained about another person, then you either use the person �s name or you use an adjective pronoun to replace the name.
E.g. Inverson complained about John �s playing... = Inverson complained about his
playing.
Inverson complained about Mary �s playing... = Inverson complained about her playing.. etc.
Instead of using a possessive adjective (my, your, his, her etc) you can use a direct object (me, you, him, her etc)
So, it �s also correct to say:
Inverson complained about him playing again... The him in this sentence refers to another person & not to Inverson.
I hope that clears things a bit for you
Regards from Greece,
Alexandra