Assuming you want only Present, Past, Future, and the three corresponding Perfect tenses - that's six.in active and six in passivefor 12 total - and not the progressives, conditionals, and emphatics..
Using the fake verb larb with past and past participle larbed;
I larb - I am larbed
I larbed - I was larbed
I will larb - I will be larbed
I have larbed - I have been larbed
I had larbed - I had been larbed
I will have larbed - I will have been larbed.