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