是.比如 A piece of paper.two pieces of paper 等.变复数时就不能在名词上变了.
advice, baggage, change(零钱), furniture, hair, homework, information, knowledge, luggage, money, news, progress, traffic ,respect, safety, salt, sand, silence, sleep, strength, snow, technology, time, trade, transport, travel...
基本上就是数的了的就是可数的, 没法数的,就是不可数的.