corn 复数要加s不?有看到eat some corn 也有 eat some corns

corn 复数要加s不?有看到eat some corn 也有 eat some corns The birds want to eat some corn.1.改为单数句 2.Eat some corn 划线提问 corn Here( )(be)some corn.Hens like it. There's some corn on the ground.线划在some上,划线提问 We want some fruit.和 He can eat fruits.为什么一个加S一个不加? Let's ----- (eat) some apples Do the parrot eat fruit and corn?怎么回答 请问:Eat some vegetables and fruit every day.为何fruit不加s? he can eat some foods 为什么can不加s不是第三人称单数加动词加s吗 corn 为什么有伤感的意思? Let’s eat some _____ English food