my grandparents have breakfast at home every morning.一般疑问句为什么加do,理由反义疑问句为什么用don‘t,理由

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my grandparents have breakfast at home every morning.
一般疑问句为什么加do,理由
反义疑问句为什么用don‘t,理由

实义动词HAVE 作谓语一般现在时变疑问句时要加DO或DOES（第三人称单数时）
Do your grandparents have breakfast at home every morning?
反义疑问句的结构是：前肯后否,或前否后肯.这句陈述部分是肯定,故疑问部分用否定,当然要加don't
My and parents have breakfast at home every morning,don't they?
区别
He is a student.- Is he a student?
He is a student,isn't he

My grandparents have some nice pictures变成否定句 用my grandparents提问 They're my grandparents l visited my grandparents These are my grandparents. My parents and my grandparents often have oranges.改为一般疑问句 We often have dinner at my grandparents'home.(改同意句 ） We often have dinner at my grandparents' home.改为一般疑问句 Our family get together.We have a big dinner at my grandparents’ My grandparents have a house with a small garden behind it 改成同义句 I have gone to the station to meet my grandparents. 变一般疑问句 They're my grandparents.对my grandparents提问 They are my grandparents.对my grandparents提问.they. They were not my grandparents. my grandparents a__ in english. 对 visit my grandparents 提问 visit my grandparents 怎么读 我的祖父母有两个儿子 英语怎么说?是不是 my grandparents have two sons.是have 还是has?