English verb conjugation
MAY CURTAIN

Regular verb: curtain - curtained - curtained

Affirmation

Simple form	V-ing form
I may curtain you may curtain he may curtain we may curtain you may curtain they may curtain	I may be curtaining you may be curtaining he may be curtaining we may be curtaining you may be curtaining they may be curtaining
Perfect	V-ing perfect
I may have curtained you may have curtained he may have curtained we may have curtained you may have curtained they may have curtained	I may have been curtaining you may have been curtaining he may have been curtaining we may have been curtaining you may have been curtaining they may have been curtaining

Negation

Simple form	V-ing form
I mayn't curtain you mayn't curtain he mayn't curtain we mayn't curtain you mayn't curtain they mayn't curtain	I mayn't be curtaining you mayn't be curtaining he mayn't be curtaining we mayn't be curtaining you mayn't be curtaining they mayn't be curtaining
Perfect	V-ing perfect
I mayn't have curtained you mayn't have curtained he mayn't have curtained we mayn't have curtained you mayn't have curtained they mayn't have curtained	I mayn't have been curtaining you mayn't have been curtaining he mayn't have been curtaining we mayn't have been curtaining you mayn't have been curtaining they mayn't have been curtaining

Interrogative form

Simple form	V-ing form
may I curtain? may you curtain? may he curtain? may we curtain? may you curtain? may they curtain?	may I be curtaining? may you be curtaining? may he be curtaining? may we be curtaining? may you be curtaining? may they be curtaining?
Perfect	V-ing perfect
may I have curtained? may you have curtained? may he have curtained? may we have curtained? may you have curtained? may they have curtained?	may I have been curtaining? may you have been curtaining? may he have been curtaining? may we have been curtaining? may you have been curtaining? may they have been curtaining?

Interro-negative form

Simple form	V-ing form
mayn't I curtain? mayn't you curtain? mayn't he curtain? mayn't we curtain? mayn't you curtain? mayn't they curtain?	mayn't I be curtaining? mayn't you be curtaining? mayn't he be curtaining? mayn't we be curtaining? mayn't you be curtaining? mayn't they be curtaining?
Perfect	V-ing perfect
mayn't I have curtained? mayn't you have curtained? mayn't he have curtained? mayn't we have curtained? mayn't you have curtained? mayn't they have curtained?	mayn't I have been curtaining? mayn't you have been curtaining? mayn't he have been curtaining? mayn't we have been curtaining? mayn't you have been curtaining? mayn't they have been curtaining?