我吃过饭了．英语怎么说

不同的情况有不同的回答,如你拜访某个人,碰巧他在吃饭,邀请你一起吃,你吃过了,不想吃,这时你可以直接了当的说,"No, thanks!"

Road to the United States that, if people ask you eat, you said I had eaten.

i have already had meal

I have had basketfast/lunch/supper

sorry，I have eaten already。

i am full.