Why don't you go for a picnic with us?改为同义句是Why not go for a picinic with us?吗?为什么

问题描述:

Why don't you go for a picnic with us?改为同义句
是Why not go for a picinic with us?吗?为什么

why not = why don`t sb do sth
都是一个意思

因为 why not = why don't sb
为什么.不.