Regular verb: sum - summed - summed
Simple form | V-ing form |
I may sum you may sum he may sum we may sum you may sum they may sum | I may be summing you may be summing he may be summing we may be summing you may be summing they may be summing |
Perfect | V-ing perfect |
I may have summed you may have summed he may have summed we may have summed you may have summed they may have summed | I may have been summing you may have been summing he may have been summing we may have been summing you may have been summing they may have been summing |
Simple form | V-ing form |
I mayn't sum you mayn't sum he mayn't sum we mayn't sum you mayn't sum they mayn't sum | I mayn't be summing you mayn't be summing he mayn't be summing we mayn't be summing you mayn't be summing they mayn't be summing |
Perfect | V-ing perfect |
I mayn't have summed you mayn't have summed he mayn't have summed we mayn't have summed you mayn't have summed they mayn't have summed | I mayn't have been summing you mayn't have been summing he mayn't have been summing we mayn't have been summing you mayn't have been summing they mayn't have been summing |
Simple form | V-ing form |
may I sum? may you sum? may he sum? may we sum? may you sum? may they sum? | may I be summing? may you be summing? may he be summing? may we be summing? may you be summing? may they be summing? |
Perfect | V-ing perfect |
may I have summed? may you have summed? may he have summed? may we have summed? may you have summed? may they have summed? | may I have been summing? may you have been summing? may he have been summing? may we have been summing? may you have been summing? may they have been summing? |
Simple form | V-ing form |
mayn't I sum? mayn't you sum? mayn't he sum? mayn't we sum? mayn't you sum? mayn't they sum? | mayn't I be summing? mayn't you be summing? mayn't he be summing? mayn't we be summing? mayn't you be summing? mayn't they be summing? |
Perfect | V-ing perfect |
mayn't I have summed? mayn't you have summed? mayn't he have summed? mayn't we have summed? mayn't you have summed? mayn't they have summed? | mayn't I have been summing? mayn't you have been summing? mayn't he have been summing? mayn't we have been summing? mayn't you have been summing? mayn't they have been summing? |