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？