candy可以做可数名词，也可以作不可数名词。candy作为“糖”这样一个总称时是不可数的。candy作为“某种品牌或者种类的糖”时，则可数，复数形式为candies。candy和sweet则通常指“糖果”，candy是美国用词，sweet是英国用词。
He gave me this book,also some candy to eat on the way home.
他给了我这本书，还给我一些糖果叫我在回家的路上吃。
They grinned with pleasure when I gave them the candy.
我给他们糖果时，他们都高兴得咧嘴笑了。
Do you like candy?
你喜欢吃糖吗？
He coughed up the candy that was stuck in his throat.
他把卡在喉咙里的糖咯了出来。
Who wants the last piece of candy?
谁想要这最后一块糖？