You need to buy some ballons and flowers.对buy提问
问题描述：
You need to buy some ballons and flowers.对buy提问
You need to buy some ballons and flowers.
否定句：
一般疑问：
反意疑问：
对some ballons and flowers提问：
对buy提问：
答
You need to buy some ballons and flowers.
否定句：You needn't buy any ballons or flowers.
一般疑问：Do you need buy some ballons or flowers?
反意疑问：Don't you need buy some ballons or flowers?
对some ballons and flowers提问：what do you need/have to buy?
对buy提问：How do you get some ballons or flowers?