I may menstruate you may menstruate he may menstruate we may menstruate you may menstruate they may menstruate
V-ing form
I may be menstruating you may be menstruating he may be menstruating we may be menstruating you may be menstruating they may be menstruating
Perfect
I may have menstruated you may have menstruated he may have menstruated we may have menstruated you may have menstruated they may have menstruated
V-ing perfect
I may have been menstruating you may have been menstruating he may have been menstruating we may have been menstruating you may have been menstruating they may have been menstruating
Negation
Simple form
I may not menstruate you may not menstruate he may not menstruate we may not menstruate you may not menstruate they may not menstruate
V-ing form
I may not be menstruating you may not be menstruating he may not be menstruating we may not be menstruating you may not be menstruating they may not be menstruating
Perfect
I may not have menstruated you may not have menstruated he may not have menstruated we may not have menstruated you may not have menstruated they may not have menstruated
V-ing perfect
I may not have been menstruating you may not have been menstruating he may not have been menstruating we may not have been menstruating you may not have been menstruating they may not have been menstruating
Interrogative form
Simple form
may I menstruate? may you menstruate? may he menstruate? may we menstruate? may you menstruate? may they menstruate?
V-ing form
may I be menstruating? may you be menstruating? may he be menstruating? may we be menstruating? may you be menstruating? may they be menstruating?
Perfect
may I have menstruated? may you have menstruated? may he have menstruated? may we have menstruated? may you have menstruated? may they have menstruated?
V-ing perfect
may I have been menstruating? may you have been menstruating? may he have been menstruating? may we have been menstruating? may you have been menstruating? may they have been menstruating?
Interro-negative form
Simple form
may I not menstruate? may you not menstruate? may he not menstruate? may we not menstruate? may you not menstruate? may they not menstruate?
V-ing form
may I not be menstruating? may you not be menstruating? may he not be menstruating? may we not be menstruating? may you not be menstruating? may they not be menstruating?
Perfect
may I not have menstruated? may you not have menstruated? may he not have menstruated? may we not have menstruated? may you not have menstruated? may they not have menstruated?
V-ing perfect
may I not have been menstruating? may you not have been menstruating? may he not have been menstruating? may we not have been menstruating? may you not have been menstruating? may they not have been menstruating?