morethan后为什么跟动词原形
Retailsalesrose0.8of1percentinAugust,intensifyingexpectationsthatpersonalspendingintheJuly-Septemberquarterwouldmorethandoublethe1.4percentgrowthrateinpersonalspendingforthepreviousquarter.请问这里的double是动词吗?为什么在morethan后用了原形?还有这0.8of1percent是什么意思?