汉译英：等我回去就煮东西给你吃…

wait 应该改成wait for sb
will后面直接加动词will do

祈使句：Wait fot me,and I' go back and cook for you.

要是要口语比较简洁上口容易理解的话，你那样说也是可以的
但是语法的确是很有问题的

机器翻译：
I have to go back on the boil, and other things for you!

个人认为：
Just waiting for me, I'll go and cook for you soon.

意思是对了，但语法不对，你看这样是不是好一点，Wait for me,I will come home to cook for you.

to wait for me cooking as long as i come back

Wait fot me,and I' go back and cook for you