I don't stack you don't stack she doesn't stack we don't stack you don't stack they don't stack
Present continuous
I'm not stacking you aren't stacking she isn't stacking we aren't stacking you aren't stacking they aren't stacking
Preterite
I didn't stack you didn't stack she didn't stack we didn't stack you didn't stack they didn't stack
Preterite continuous
I wasn't stacking you weren't stacking she wasn't stacking we weren't stacking you weren't stacking they weren't stacking
Present perfect
I haven't stacked you haven't stacked she hasn't stacked we haven't stacked you haven't stacked they haven't stacked
Present perfect continuous
I haven't been stacking you haven't been stacking she hasn't been stacking we haven't been stacking you haven't been stacking they haven't been stacking
Pluperfect
I hadn't stacked you hadn't stacked she hadn't stacked we hadn't stacked you hadn't stacked they hadn't stacked
Pluperfect continuous
I hadn't been stacking you hadn't been stacking she hadn't been stacking we hadn't been stacking you hadn't been stacking they hadn't been stacking
Future
I won't stack you won't stack she won't stack we won't stack you won't stack they won't stack
Future continuous
I won't be stacking you won't be stacking she won't be stacking we won't be stacking you won't be stacking they won't be stacking
Future perfect
I won't have stacked you won't have stacked she won't have stacked we won't have stacked you won't have stacked they won't have stacked
Future perfect continuous
I won't have been stacking you won't have been stacking she won't have been stacking we won't have been stacking you won't have been stacking they won't have been stacking
Conditional
Present
I wouldn't stack you wouldn't stack she wouldn't stack we wouldn't stack you wouldn't stack they wouldn't stack
Present continuous
I wouldn't be stacking you wouldn't be stacking she wouldn't be stacking we wouldn't be stacking you wouldn't be stacking they wouldn't be stacking
Past
I wouldn't have stacked you wouldn't have stacked she wouldn't have stacked we wouldn't have stacked you wouldn't have stacked they wouldn't have stacked
Past continuous
I wouldn't have been stacking you wouldn't have been stacking she wouldn't have been stacking we wouldn't have been stacking you wouldn't have been stacking they wouldn't have been stacking