主句宾语是as much in the past 3 years as would have taken 10 years in the past（在过去的三年里,我们做了10年的事情）in the past 3 years 为插入语,不必看它,难么这句话就是We have accomplished as much as would have taken 10 years in the past.明显would 前面少了时间的形式宾语it,可以加也可以不加.