I may commemorate you may commemorate she may commemorate we may commemorate you may commemorate they may commemorate
V-ing form
I may be commemorating you may be commemorating she may be commemorating we may be commemorating you may be commemorating they may be commemorating
Perfect
I may have commemorated you may have commemorated she may have commemorated we may have commemorated you may have commemorated they may have commemorated
V-ing perfect
I may have been commemorating you may have been commemorating she may have been commemorating we may have been commemorating you may have been commemorating they may have been commemorating
Negation
Simple form
I may not commemorate you may not commemorate she may not commemorate we may not commemorate you may not commemorate they may not commemorate
V-ing form
I may not be commemorating you may not be commemorating she may not be commemorating we may not be commemorating you may not be commemorating they may not be commemorating
Perfect
I may not have commemorated you may not have commemorated she may not have commemorated we may not have commemorated you may not have commemorated they may not have commemorated
V-ing perfect
I may not have been commemorating you may not have been commemorating she may not have been commemorating we may not have been commemorating you may not have been commemorating they may not have been commemorating
Interrogative form
Simple form
may I commemorate? may you commemorate? may she commemorate? may we commemorate? may you commemorate? may they commemorate?
V-ing form
may I be commemorating? may you be commemorating? may she be commemorating? may we be commemorating? may you be commemorating? may they be commemorating?
Perfect
may I have commemorated? may you have commemorated? may she have commemorated? may we have commemorated? may you have commemorated? may they have commemorated?
V-ing perfect
may I have been commemorating? may you have been commemorating? may she have been commemorating? may we have been commemorating? may you have been commemorating? may they have been commemorating?
Interro-negative form
Simple form
may I not commemorate? may you not commemorate? may she not commemorate? may we not commemorate? may you not commemorate? may they not commemorate?
V-ing form
may I not be commemorating? may you not be commemorating? may she not be commemorating? may we not be commemorating? may you not be commemorating? may they not be commemorating?
Perfect
may I not have commemorated? may you not have commemorated? may she not have commemorated? may we not have commemorated? may you not have commemorated? may they not have commemorated?
V-ing perfect
may I not have been commemorating? may you not have been commemorating? may she not have been commemorating? may we not have been commemorating? may you not have been commemorating? may they not have been commemorating?