I double you double he doubles we double you double they double
Present continuous
I am doubling you are doubling he is doubling we are doubling you are doubling they are doubling
Preterite
I doubled you doubled he doubled we doubled you doubled they doubled
Preterite continuous
I was doubling you were doubling he was doubling we were doubling you were doubling they were doubling
Present perfect
I have doubled you have doubled he has doubled we have doubled you have doubled they have doubled
Present perfect continuous
I have been doubling you have been doubling he has been doubling we have been doubling you have been doubling they have been doubling
Pluperfect
I had doubled you had doubled he had doubled we had doubled you had doubled they had doubled
Pluperfect continuous
I had been doubling you had been doubling he had been doubling we had been doubling you had been doubling they had been doubling
Future
I will double you will double he will double we will double you will double they will double
Future continuous
I will be doubling you will be doubling he will be doubling we will be doubling you will be doubling they will be doubling
Future perfect
I will have doubled you will have doubled he will have doubled we will have doubled you will have doubled they will have doubled
Future perfect continuous
I will have been doubling you will have been doubling he will have been doubling we will have been doubling you will have been doubling they will have been doubling
Conditional
Present
I would double you would double he would double we would double you would double they would double
Present continuous
I would be doubling you would be doubling he would be doubling we would be doubling you would be doubling they would be doubling
Past
I would have doubled you would have doubled he would have doubled we would have doubled you would have doubled they would have doubled
Past continuous
I would have been doubling you would have been doubling he would have been doubling we would have been doubling you would have been doubling they would have been doubling