用英语说吃饭了吗怎么说

"Have you had dinner?" 是问别人吃饭了没有的常用说法。

其中 "Have you" 是主语, "had dinner" 是完整的谓语，"had" 是助动词， "dinner" 是名词，表示"吃晚饭"的意思。

例句：

"Have you had dinner yet?"
"I was wondering if you've had dinner."
"I was just about to ask if you've had dinner."

翻译：

你晚饭吃了吗？
我在想你晚饭吃了没有？
我刚才想问你晚饭吃了没有。