fall +副词是什么用法？例如fall+greatly /slowly My score

Question

fall +副词是什么用法？例如fall+greatly /slowly My score fell greatly.为什么不说My score fell down greatly?

Answer 1

v. 跌倒; 落下; 减少; 沦陷;
n. 秋天; 落下; 瀑布; 减少;
Winds reached up to 100mph in some places with an inch of rain falling within 15 minutes.
风力在一些地方达到了每小时100英里，15分钟内降雨量达一英寸。
[其他] 第三人称单数：falls 现在分词：falling 过去式：fell 过去分词：fallen