soap是不可数的。只有一种情况可数，就是它当肥皂剧讲的时候因为soap的英文释义中提到的用途是wash yourself or sometimes for washing clothes，作肥皂时既可以用作可数也可以用作不可数，但还是作为不可数的见得比较多。
相关介绍
Make sure you rinse all the soap out.
一定要把皂液冲洗干净。
This soap is very gentle on the hands.
这肥皂擦在手上非常柔和。
Children today are brought up on a diet of television cartoons and soap operas.
如今的孩子是看电视上的动画片和肥皂剧长大的。
Wash your face thoroughly with a mild soap and warm water.
用刺激性不强的肥皂和热水把脸彻底洗干净。
