what do you need for school?中为什么要用for?

What do you need for school怎么回答? What do you need for... 用 What do you need for ...What do you want?what have you got what do you need for the new school term?where can you buy f what school things do you need?为什么school things要放在what 后面? 英语翻译翻译：Do you need bags for school? Do you need a bag for sports or school? Do you need bags for sports or school的意思! Do you need bags for sports or school. you need to do what seems right for you翻译 怎么回答What do you need for you picnic这个问题? what do you need for math class?的回答