more than后为什么跟动词原形
Retail sales rose 0.8 of 1 percent in August,intensifying expectations that personal spending in the July-September quarter would more than double the 1.4 percent growth rate in personal spending for the previous quarter.请问这里的double是动词吗?为什么在more than后用了原形?还有这0.8 of 1 percent是什么意思?