Can I have a meal with you?

我可以和你吃饭吗？

I'm going to have a meal.

你接着看电视吧，我吃饭了。

Do you have a meal?

你准备吃饭了吗？

Have a meal with the old if you have time.

有时间陪老人吃顿饭了。

Let's have a meal together when we are free.

等我们大家有时间了，一起吃饭。