Question

英语达人们，求助！

All the students in class like rice,because it's healthy food .
这句话中because it's healthy food 变成一般疑问句怎么变？
我的疑问是老师讲过句子中有be动词不用助动词，这里的it's扩成it is 就有be动词了，为什么改成why do they like rice?
为什么！为什么！为什么！
求助啊……！

Answer 1

你的思路有点混
先是问Why do they like rice?回答Because it's healthy food.
因为这是原因 ，回答疑问句不一定用同一性质动词
所以问Why do they like rice?便回答Because it's healthy food.
老师讲过句子中有be动词不用助动词，那是看情况
Why are you so late ?be动词 why do they like rice？助动词 两者不一起存在

Answer 2

because it's healthy food这句是是从句，All the students in class like rice改成问句跟从句没有什么关系的。
就是why do they like rice?，是把All the students in class like rice改成问句，要不你再多读几遍？

Answer 3

why do they like rice?是特殊疑问句

Answer 4

1. 你要先把这个中文翻译出来：我们班的同学都喜欢米饭，因为是健康食品

2. because 是都是用why来问