Complex sentence: Later, when Greg asks Rowley to take him again into the Country Club, Rowley lies and states he's not going there, but Greg sneaks in, pretending to be a member of the Jefferson family.
Split into simpler sentences: Later, when Greg asks Rowley to take him again into the Country Club, Rowley lies and states he is not going there. Still, Greg sneaks in, pretending to be a member of the Jefferson family.