I may sputter you may sputter he may sputter we may sputter you may sputter they may sputter
V-ing form
I may be sputtering you may be sputtering he may be sputtering we may be sputtering you may be sputtering they may be sputtering
Perfect
I may have sputtered you may have sputtered he may have sputtered we may have sputtered you may have sputtered they may have sputtered
V-ing perfect
I may have been sputtering you may have been sputtering he may have been sputtering we may have been sputtering you may have been sputtering they may have been sputtering
Negation
Simple form
I mayn't sputter you mayn't sputter he mayn't sputter we mayn't sputter you mayn't sputter they mayn't sputter
V-ing form
I mayn't be sputtering you mayn't be sputtering he mayn't be sputtering we mayn't be sputtering you mayn't be sputtering they mayn't be sputtering
Perfect
I mayn't have sputtered you mayn't have sputtered he mayn't have sputtered we mayn't have sputtered you mayn't have sputtered they mayn't have sputtered
V-ing perfect
I mayn't have been sputtering you mayn't have been sputtering he mayn't have been sputtering we mayn't have been sputtering you mayn't have been sputtering they mayn't have been sputtering
Interrogative form
Simple form
may I sputter? may you sputter? may he sputter? may we sputter? may you sputter? may they sputter?
V-ing form
may I be sputtering? may you be sputtering? may he be sputtering? may we be sputtering? may you be sputtering? may they be sputtering?
Perfect
may I have sputtered? may you have sputtered? may he have sputtered? may we have sputtered? may you have sputtered? may they have sputtered?
V-ing perfect
may I have been sputtering? may you have been sputtering? may he have been sputtering? may we have been sputtering? may you have been sputtering? may they have been sputtering?
Interro-negative form
Simple form
mayn't I sputter? mayn't you sputter? mayn't he sputter? mayn't we sputter? mayn't you sputter? mayn't they sputter?
V-ing form
mayn't I be sputtering? mayn't you be sputtering? mayn't he be sputtering? mayn't we be sputtering? mayn't you be sputtering? mayn't they be sputtering?
Perfect
mayn't I have sputtered? mayn't you have sputtered? mayn't he have sputtered? mayn't we have sputtered? mayn't you have sputtered? mayn't they have sputtered?
V-ing perfect
mayn't I have been sputtering? mayn't you have been sputtering? mayn't he have been sputtering? mayn't we have been sputtering? mayn't you have been sputtering? mayn't they have been sputtering?