"吃午饭了吗"用英语可以说成"Did you eat lunch?"。

来源：

这句话来自于英语里提问别人"吃饭了吗"的传统说法，"eat"是英语里"吃"的意思，"lunch"是指"午饭"。

英文例句及中文翻译：

Did you eat lunch yet? (你吃午饭了吗？)

Have you had lunch? (你吃午饭了吗？)

Are you hungry? (你饿了吗？)

Would you like to grab some lunch? (你想吃午饭吗？)