I double-bill you double-bill he double-bills we double-bill you double-bill they double-bill
Present continuous
I am double-billing you are double-billing he is double-billing we are double-billing you are double-billing they are double-billing
Preterite
I double-billed you double-billed he double-billed we double-billed you double-billed they double-billed
Preterite continuous
I was double-billing you were double-billing he was double-billing we were double-billing you were double-billing they were double-billing
Present perfect
I have double-billed you have double-billed he has double-billed we have double-billed you have double-billed they have double-billed
Present perfect continuous
I have been double-billing you have been double-billing he has been double-billing we have been double-billing you have been double-billing they have been double-billing
Pluperfect
I had double-billed you had double-billed he had double-billed we had double-billed you had double-billed they had double-billed
Pluperfect continuous
I had been double-billing you had been double-billing he had been double-billing we had been double-billing you had been double-billing they had been double-billing
Future
I will double-bill you will double-bill he will double-bill we will double-bill you will double-bill they will double-bill
Future continuous
I will be double-billing you will be double-billing he will be double-billing we will be double-billing you will be double-billing they will be double-billing
Future perfect
I will have double-billed you will have double-billed he will have double-billed we will have double-billed you will have double-billed they will have double-billed
Future perfect continuous
I will have been double-billing you will have been double-billing he will have been double-billing we will have been double-billing you will have been double-billing they will have been double-billing
Conditional
Present
I would double-bill you would double-bill he would double-bill we would double-bill you would double-bill they would double-bill
Present continuous
I would be double-billing you would be double-billing he would be double-billing we would be double-billing you would be double-billing they would be double-billing
Past
I would have double-billed you would have double-billed he would have double-billed we would have double-billed you would have double-billed they would have double-billed
Past continuous
I would have been double-billing you would have been double-billing he would have been double-billing we would have been double-billing you would have been double-billing they would have been double-billing