What is the impact of the way Fitzgerald uses time frames in chapter 8?

The chapter talks about the present and the past. It talks about the past of Gatsby and Cody, Gatsby and Daisy, and so on. And because by the end of the chapter Gatsby is dead, so it is reminding the reader of Gatsby's past and life. It adds some information that the reader didn't previously know before. For the present it talks about what happened with Myrtle's death, and in this case Nick is just letting the reader know what happened.