Gay rights activist Larry Kramer has long speculated that Lincoln was gay, claiming in 1999 that he'd discovered Lincoln's love letters toonetime roommate Joshua Speed
这个为何时间状语放到了claim后面，为何that不是修饰1999，而是宾语从句?
claiming in 1999 that he'd discovered Lincoln's love letters to onetime roommate Joshua Speed
1. that he'd discovered Lincoln's love letters to onetime roommate Joshua Speed，是claiming 的宾语。
2. in 1999 是claiming 的时间状语。
3. 当状语短、宾语长的时候，为了句子匀称，可以把短的状语放在前面，宾语在后。
地方不同，差别非常大：
He said yesterday that he was ill. （昨天说）
He said that he was ill yesterday. （昨天病了）
