分析下面句子的結(jié)構(gòu)（主謂賓）
As long ago as the 14th century,an Englishman,Sir John Hawkwood,made the remarkable discovery that people would rather pay large sums of money than have their life work destroyed by gangsters.
還有,
為什么
As long ago as the 14th century,an Englishman,Sir John Hawkwood,made the remarkable discovery that people would rather pay large sums of money than have their life work（was) destroyed by gangsters.
為什么不能加（was)