I do not stack you do not stack he does not stack we do not stack you do not stack they do not stack
Present continuous
I am not stacking you are not stacking he is not stacking we are not stacking you are not stacking they are not stacking
Preterite
I did not stack you did not stack he did not stack we did not stack you did not stack they did not stack
Preterite continuous
I was not stacking you were not stacking he was not stacking we were not stacking you were not stacking they were not stacking
Present perfect
I have not stacked you have not stacked he has not stacked we have not stacked you have not stacked they have not stacked
Present perfect continuous
I have not been stacking you have not been stacking he has not been stacking we have not been stacking you have not been stacking they have not been stacking
Pluperfect
I had not stacked you had not stacked he had not stacked we had not stacked you had not stacked they had not stacked
Pluperfect continuous
I had not been stacking you had not been stacking he had not been stacking we had not been stacking you had not been stacking they had not been stacking
Future
I will not stack you will not stack he will not stack we will not stack you will not stack they will not stack
Future continuous
I will not be stacking you will not be stacking he will not be stacking we will not be stacking you will not be stacking they will not be stacking
Future perfect
I will not have stacked you will not have stacked he will not have stacked we will not have stacked you will not have stacked they will not have stacked
Future perfect continuous
I will not have been stacking you will not have been stacking he will not have been stacking we will not have been stacking you will not have been stacking they will not have been stacking
Conditional
Present
I would not stack you would not stack he would not stack we would not stack you would not stack they would not stack
Present continuous
I would not be stacking you would not be stacking he would not be stacking we would not be stacking you would not be stacking they would not be stacking
Past
I would not have stacked you would not have stacked he would not have stacked we would not have stacked you would not have stacked they would not have stacked
Past continuous
I would not have been stacking you would not have been stacking he would not have been stacking we would not have been stacking you would not have been stacking they would not have been stacking