Do you have a lunch你吃了中饭了吗 可以这样说吗?

Do you have a lunch你吃了中饭了吗 可以这样说吗? what do you have for lunch?这句话是什么结构,我怎么每次想说你午餐吃了什么,都想不到这样说,求 你中饭想吃什么?是不是说出what would you like to have lunch? What do you have for lunch today?翻译成“你今天午饭吃了什么? Have you had lunch和Did you have lunch,意思貌似都是：询问对方你吃过午饭了吗?有什么 Have you had lunch yet?你吃午饭了吗?把yet去掉不行吗?原因是什么? 你在上海生活多久了： how long do you live in shanghai? 可以这样说吗? I have have lunch for 2 hours 我已经吃过午饭2个小时了,是这么说吗 你午饭吃什么? 英语1.What do you have for lunch? /What will you have 这样说对吗?：你上火车了吗?Do you get on the train? When do you have lunch at 哪里错了? Do you have a dog?肯定回答时能这样说吗?Yes,I do.或者说Yes,I have.