1.The past must be kept in its place, outlived and outgrown.
2.Let the past outlive and outgrown our life.
1. The past(主语) must be kept(谓语动词) in its place(地址状语), outlived and outgrown(与 kept 并列、且省略了must be 的谓语部分。即:must be kept, outlived and outgrown).
2. Let (谓语动词) the past(宾语)outlive and outgrow our life.(宾补)