His favorite food is apples.

这个问题我问过外教,应该是：
His favorite food is apples.is是修饰前面的food.还比如：
My favorite food is pork,mutton.
Apples are my favorite food .
apple 作为种类的话要用复数．
例如：I like apples.

那不一定,是一类

不用复数吧

不对
His favorite food are the apples.

我觉得应该说 Aapple is his favorite food.

不对，这个句子有两种说法：His favourite food is apple.或者His favourite food are apples.英语中，名词的单复数一定要与系动词一致。

在中国应试教育*下应该是His favorite food is apple。其他情况下说apples也没什么错，只要别人能明白你意思就好咯

不对，没有复数。
apple 就好了。
是指的一类的东西用单数

不对,至少在这个句子中apple是不应该用复数的.Aapple is he favorite.也可以啊.不一定要说明是食物因为大家都知道苹果是一种食物啊.还可以说:Apple is one of he favorite food.

可以这么说：
He is favorite of apple.
或者：
He is in favorite of apple.

apple

His favorite food are apples.

His favorite food is apple.
His favorite food are apples.
我的加拿大朋友告诉我的

His favourite food is the apple.