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