你食了饭没有？是不是do you have dinner?

Have you had your dinner?
你说的那句应该翻译为 你吃饭么？

Have you had your meal now?

Have you eaten dinner?

have you had dinner ? or Have you finished your dinner?

可以
也可以是：
have you had dinner

这个是你吃晚饭了没有

正确应该是: Do you have a meal?