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