His mother found he playing computer games last eveningwhy not use "His mother found him playing computer games last evening 为什么不用him

Question

His mother found he playing computer games last evening
why not use "His mother found him playing computer games last evening 为什么不用him

Answer 1

这是个从句,found后省略了that,所以he是做后面的从句的主语而不是found的宾语.故不能用him