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