Their sons like hamburgers and eggs变为单数形式

问题描述:

Their sons like hamburgers and eggs变为单数形式

His son likes hamburgers and eggs. 主语单数
Their sons like hamburger and egg. 宾语单数
His son likes hamburger and egg. 主谓宾均单数

this son likes hamburger and egg 。

his son likes hamburgers and eggs
宾语不可以改单数,若改——His son likes the hamburger and the egg,不符合语言习惯.