你的问题很有趣,我也想了一下什么时候我用复数什么时候用单数.
我查了一下,概括的很好:
chocolate (uncountable and countable; plural chocolates)
(uncountable) A food made from ground roasted cocoa beans.不可数-当作一种食物时
Chocolate has become a favorite snack of people around the world.
(countable) A small piece of confectionery made from chocolate.可数-一块巧克力做的糖
He bought her some chocolates as a gift.
(uncountable) A dark reddish-brown colour/color,like that of chocolate.不可数-当作形容颜色使用时.
As he cooked it the whole thing turned a rich deep chocolate