I may green you may green she may green we may green you may green they may green
V-ing form
I may be greening you may be greening she may be greening we may be greening you may be greening they may be greening
Perfect
I may have greened you may have greened she may have greened we may have greened you may have greened they may have greened
V-ing perfect
I may have been greening you may have been greening she may have been greening we may have been greening you may have been greening they may have been greening
Negation
Simple form
I may not green you may not green she may not green we may not green you may not green they may not green
V-ing form
I may not be greening you may not be greening she may not be greening we may not be greening you may not be greening they may not be greening
Perfect
I may not have greened you may not have greened she may not have greened we may not have greened you may not have greened they may not have greened
V-ing perfect
I may not have been greening you may not have been greening she may not have been greening we may not have been greening you may not have been greening they may not have been greening
Interrogative form
Simple form
may I green? may you green? may she green? may we green? may you green? may they green?
V-ing form
may I be greening? may you be greening? may she be greening? may we be greening? may you be greening? may they be greening?
Perfect
may I have greened? may you have greened? may she have greened? may we have greened? may you have greened? may they have greened?
V-ing perfect
may I have been greening? may you have been greening? may she have been greening? may we have been greening? may you have been greening? may they have been greening?
Interro-negative form
Simple form
may I not green? may you not green? may she not green? may we not green? may you not green? may they not green?
V-ing form
may I not be greening? may you not be greening? may she not be greening? may we not be greening? may you not be greening? may they not be greening?
Perfect
may I not have greened? may you not have greened? may she not have greened? may we not have greened? may you not have greened? may they not have greened?
V-ing perfect
may I not have been greening? may you not have been greening? may she not have been greening? may we not have been greening? may you not have been greening? may they not have been greening?