I may mast you may mast she may mast we may mast you may mast they may mast
V-ing form
I may be masting you may be masting she may be masting we may be masting you may be masting they may be masting
Perfect
I may have masted you may have masted she may have masted we may have masted you may have masted they may have masted
V-ing perfect
I may have been masting you may have been masting she may have been masting we may have been masting you may have been masting they may have been masting
Negation
Simple form
I may not mast you may not mast she may not mast we may not mast you may not mast they may not mast
V-ing form
I may not be masting you may not be masting she may not be masting we may not be masting you may not be masting they may not be masting
Perfect
I may not have masted you may not have masted she may not have masted we may not have masted you may not have masted they may not have masted
V-ing perfect
I may not have been masting you may not have been masting she may not have been masting we may not have been masting you may not have been masting they may not have been masting
Interrogative form
Simple form
may I mast? may you mast? may she mast? may we mast? may you mast? may they mast?
V-ing form
may I be masting? may you be masting? may she be masting? may we be masting? may you be masting? may they be masting?
Perfect
may I have masted? may you have masted? may she have masted? may we have masted? may you have masted? may they have masted?
V-ing perfect
may I have been masting? may you have been masting? may she have been masting? may we have been masting? may you have been masting? may they have been masting?
Interro-negative form
Simple form
may I not mast? may you not mast? may she not mast? may we not mast? may you not mast? may they not mast?
V-ing form
may I not be masting? may you not be masting? may she not be masting? may we not be masting? may you not be masting? may they not be masting?
Perfect
may I not have masted? may you not have masted? may she not have masted? may we not have masted? may you not have masted? may they not have masted?
V-ing perfect
may I not have been masting? may you not have been masting? may she not have been masting? may we not have been masting? may you not have been masting? may they not have been masting?