我写完作业后再吃饭 英语翻译。

I will have my meal after i finish my homework.
I will have my meal after finishing my homework.

I will have diner after finishing the homework

I will have a dinner after I finish my homework.

Having finished my homework, I am having meal.
分词作状语,没有问题

I won't have dinner/lunch until I finish the assignments

I won't have meal until I finish my homework.
这个应该也是可以的吧.