不可数名词谓语动词单数还是复数

不可数名词后面谓语形式

一个不可数名词+单数谓语：water is useful.

两个不可数名词表达一种意思+单数谓语:

Bread and butter is delicious.奶油面包很好吃.

两个以上的不可数名词表达多种意思+复数谓语:

The bread and butter are needed.面包和奶油都需要.

and连接两个名词做主语时,谓语原则上用复数,但是两个名词若构成一个整体事物时,谓语则用单数。

The teacher and his son are picking les now.(老师和他的儿子在摘苹果)

Fish and chips is very famous food.(鱼和薯条是一种出名的食品)