When was the telephone invented,do you konw?为什么这里用was不是were?

问题描述:

When was the telephone invented,do you konw?为什么这里用was不是were?

因为主语是the telephone 【单数】所以用【was】
were 是复数,不一致
请在客户端右上角评价点“满意”即可复数的时候是什么样子?be 动词就是are行为动词(如go, walk come 等)用动词原形