slow 与 slowly 都可用作副词，意思是“慢”，具体用法与区别如下：
1. slow 的用法
slow 用作副词通常只用于少数动词(如 go, drive, pass, run, climb 等)，且必须置于其后。如：
This watch runs slow.这只手表走得慢。
Go slow in heavy traffic.交通繁忙时要慢行。
Progress is maddeningly slow.进展慢得令人心烦。
Sound travels slower than light. 声音传播不如光快。
Can you drive a bit slower? 你可以开慢一点吗？
The government is going slow on tax reforms.政府对于税务改革渐渐失去了热情。
注：在某些特殊句型中，可能放在主语之前。如：
How slow [slowly] the time passes! 时间过得真慢!
单词：slowly的近义词、反义词、形近词辨析
slow/slowly
A feather falls slower than a stone.羽毛比石头落得慢。
He observed that feathers fell to the ground slowly.他观察到羽毛落地很慢。
<辨析>两者都可以用作副词，表示“慢慢地”的意思。slow 常用在动词 go,drive,speak,read 等后面或副词 how 后面。如：How slow he walks!他走得多慢啊！My watch goes slow.我的表经常慢。slowly 可置于行为动词的前后或句首。如：Mr Baker's face slowly turned red.贝克先生的脸慢慢地变红了。slow 的比较级和最高级是 slower,slowest；而 slowly 的比较级和最高级是 more slowly,most slowly。slow 还可作形容词，意为“慢的”、“迟钝的”。如：He was old and slow.他年纪大，行动迟缓。
与单词：slowly 相关的例句或者名人名言
The tortoise is slowly crossing the field.
乌龟慢慢地在地上爬。
Please speak slowly and softly.
请缓慢和轻柔地说。
The elevator descended slowly to the ground floor.
电梯缓慢地下降到底楼。
Please speak slowly so that everyone can hear you clearly.
慢点说，让每个人都可以听清楚。
※Make haste slowly. 从容赶急。
※Mills of God grind slowly but sure. 天网恢恢，疏而不漏。
※The mills of God grind slowly but sure. 天网恢恢，疏而不漏。
※Deliberate slowly, execute promptly. 思谋要慢,行动要快.
