I may witness you may witness she may witness we may witness you may witness they may witness
V-ing form
I may be witnessing you may be witnessing she may be witnessing we may be witnessing you may be witnessing they may be witnessing
Perfect
I may have witnessed you may have witnessed she may have witnessed we may have witnessed you may have witnessed they may have witnessed
V-ing perfect
I may have been witnessing you may have been witnessing she may have been witnessing we may have been witnessing you may have been witnessing they may have been witnessing
Negation
Simple form
I may not witness you may not witness she may not witness we may not witness you may not witness they may not witness
V-ing form
I may not be witnessing you may not be witnessing she may not be witnessing we may not be witnessing you may not be witnessing they may not be witnessing
Perfect
I may not have witnessed you may not have witnessed she may not have witnessed we may not have witnessed you may not have witnessed they may not have witnessed
V-ing perfect
I may not have been witnessing you may not have been witnessing she may not have been witnessing we may not have been witnessing you may not have been witnessing they may not have been witnessing
Interrogative form
Simple form
may I witness? may you witness? may she witness? may we witness? may you witness? may they witness?
V-ing form
may I be witnessing? may you be witnessing? may she be witnessing? may we be witnessing? may you be witnessing? may they be witnessing?
Perfect
may I have witnessed? may you have witnessed? may she have witnessed? may we have witnessed? may you have witnessed? may they have witnessed?
V-ing perfect
may I have been witnessing? may you have been witnessing? may she have been witnessing? may we have been witnessing? may you have been witnessing? may they have been witnessing?
Interro-negative form
Simple form
may I not witness? may you not witness? may she not witness? may we not witness? may you not witness? may they not witness?
V-ing form
may I not be witnessing? may you not be witnessing? may she not be witnessing? may we not be witnessing? may you not be witnessing? may they not be witnessing?
Perfect
may I not have witnessed? may you not have witnessed? may she not have witnessed? may we not have witnessed? may you not have witnessed? may they not have witnessed?
V-ing perfect
may I not have been witnessing? may you not have been witnessing? may she not have been witnessing? may we not have been witnessing? may you not have been witnessing? may they not have been witnessing?