I don't sum you don't sum he doesn't sum we don't sum you don't sum they don't sum
Present continuous
I'm not summing you aren't summing he isn't summing we aren't summing you aren't summing they aren't summing
Preterite
I didn't sum you didn't sum he didn't sum we didn't sum you didn't sum they didn't sum
Preterite continuous
I wasn't summing you weren't summing he wasn't summing we weren't summing you weren't summing they weren't summing
Present perfect
I haven't summed you haven't summed he hasn't summed we haven't summed you haven't summed they haven't summed
Present perfect continuous
I haven't been summing you haven't been summing he hasn't been summing we haven't been summing you haven't been summing they haven't been summing
Pluperfect
I hadn't summed you hadn't summed he hadn't summed we hadn't summed you hadn't summed they hadn't summed
Pluperfect continuous
I hadn't been summing you hadn't been summing he hadn't been summing we hadn't been summing you hadn't been summing they hadn't been summing
Future
I won't sum you won't sum he won't sum we won't sum you won't sum they won't sum
Future continuous
I won't be summing you won't be summing he won't be summing we won't be summing you won't be summing they won't be summing
Future perfect
I won't have summed you won't have summed he won't have summed we won't have summed you won't have summed they won't have summed
Future perfect continuous
I won't have been summing you won't have been summing he won't have been summing we won't have been summing you won't have been summing they won't have been summing
Conditional
Present
I wouldn't sum you wouldn't sum he wouldn't sum we wouldn't sum you wouldn't sum they wouldn't sum
Present continuous
I wouldn't be summing you wouldn't be summing he wouldn't be summing we wouldn't be summing you wouldn't be summing they wouldn't be summing
Past
I wouldn't have summed you wouldn't have summed he wouldn't have summed we wouldn't have summed you wouldn't have summed they wouldn't have summed
Past continuous
I wouldn't have been summing you wouldn't have been summing he wouldn't have been summing we wouldn't have been summing you wouldn't have been summing they wouldn't have been summing