I have already had lunch.--为什么在already前要加"have",下面不行吗?

I have already had lunch.--为什么在already前要加"have",下面不行吗? I have already had lunch 是什么结构 英语翻译如 I have already had lunch.l have just had lunch.那l have I have already had lunch.改为否定句. I have already had lunch.(变为一般疑问句） I have already had found I've already had lunch.Have you had lunch yet?这是什么时态呢? I said I ____ (have) lunch already. have already had mine 英语翻译I have already had lunch .这是新概念的翻译 我这样翻译“I had lunch alr I___(have)my lunch already I've already had lunch.Have you had lunch yet?这是新概念二第4课的课后练习