Question

i(have) my dinner before he came.correct tense

Answer 1

Hey mate !!
Here's your answer ^_=

I had had my dinner before he came.

Hope this helps..☺☺

Answer 2

The correct ans will be

I had done my dinner before he came.
or
I had had my dinner before he came.

rule ***
we will use had that is past perfect as we find came in simple past tense in the other half of the sentence ***

hope it is helpful