(8) S+V 插入语
The death of Harry Potter, Ms.Mcgonagall say, is unexpected.
The arousal of social optimism of economy, experts claim, causes the overwhelmingly market fluctuations.
JC Penny buyers estimate that their sales will double next month.
Sales JC Penny buyers estimate will double next month.
Sales, JC Penny Buyers estimate, will double next month.
Sales will double, JC Penny buyers estimate, next month.
(9) IF 插入语
trade or taxation occurred many decades, if not centuries, earlier that it was previously believed. 折中的语气
意思是 即使没有decades，也有centuries. (这地方要平行，里面是noun vs noun, ）
(10) 比较后项推测
American football players are significantly contributing to the economy [that they pay half of their contract wage as tax] as some quantitive analysts previously calculated 主动/被动都可以.
[SOMETHING WAS] Previously thought 前面的句子一般被省略，那找前面的[that 句子] 主动/被动都可以.
capripopcorn.com 