I know 【I will think about how she rebuilt her life whenever my life feels unbearable】整个句子是宾语从句,做know的宾语；其中：
【whenever my life feels unbearable】是whenever 引导的状语从句,
【I will think about how she rebuilt her life】是其相对应的主句；
在主句中：
【how she rebuilt her life】是宾语从句又做了think about的宾语.