I may frost you may frost she may frost we may frost you may frost they may frost
V-ing form
I may be frosting you may be frosting she may be frosting we may be frosting you may be frosting they may be frosting
Perfect
I may have frosted you may have frosted she may have frosted we may have frosted you may have frosted they may have frosted
V-ing perfect
I may have been frosting you may have been frosting she may have been frosting we may have been frosting you may have been frosting they may have been frosting
Negation
Simple form
I may not frost you may not frost she may not frost we may not frost you may not frost they may not frost
V-ing form
I may not be frosting you may not be frosting she may not be frosting we may not be frosting you may not be frosting they may not be frosting
Perfect
I may not have frosted you may not have frosted she may not have frosted we may not have frosted you may not have frosted they may not have frosted
V-ing perfect
I may not have been frosting you may not have been frosting she may not have been frosting we may not have been frosting you may not have been frosting they may not have been frosting
Interrogative form
Simple form
may I frost? may you frost? may she frost? may we frost? may you frost? may they frost?
V-ing form
may I be frosting? may you be frosting? may she be frosting? may we be frosting? may you be frosting? may they be frosting?
Perfect
may I have frosted? may you have frosted? may she have frosted? may we have frosted? may you have frosted? may they have frosted?
V-ing perfect
may I have been frosting? may you have been frosting? may she have been frosting? may we have been frosting? may you have been frosting? may they have been frosting?
Interro-negative form
Simple form
may I not frost? may you not frost? may she not frost? may we not frost? may you not frost? may they not frost?
V-ing form
may I not be frosting? may you not be frosting? may she not be frosting? may we not be frosting? may you not be frosting? may they not be frosting?
Perfect
may I not have frosted? may you not have frosted? may she not have frosted? may we not have frosted? may you not have frosted? may they not have frosted?
V-ing perfect
may I not have been frosting? may you not have been frosting? may she not have been frosting? may we not have been frosting? may you not have been frosting? may they not have been frosting?