复数 两种在一起是复数的这个就好比说apple is delicious 和 banana is delicious
但是两个放一起的时候就变成了
apple and banana are delicious
两种东西做主语的时候用复数形式例如：What you did and what you said are What I had done and what I had said..
你做的事和你说的话是我早就做过的,我早就说过的.
What you did and what you said是并列的两个主语从句.谓语动词要用复数
又如
Coffee and tea are drinks.咖啡和茶都是饮料.希望采纳哈,嘿嘿