他午饭吃什么用英语怎么说

"What did he have for lunch?" 这是询问"他午饭吃什么"的英文表达。

"have"是"吃"的意思，"for lunch"是"午饭"的意思。

例句:

"What did you have for lunch today?" (你今天午饭吃了什么?)
"I had a sandwich for lunch." (我午饭吃了三明治)
"Did he tell you what he had for lunch?" (他告诉你他午饭吃了什么吗?)