I may piggyback you may piggyback he may piggyback we may piggyback you may piggyback they may piggyback
V-ing form
I may be piggybacking you may be piggybacking he may be piggybacking we may be piggybacking you may be piggybacking they may be piggybacking
Perfect
I may have piggybacked you may have piggybacked he may have piggybacked we may have piggybacked you may have piggybacked they may have piggybacked
V-ing perfect
I may have been piggybacking you may have been piggybacking he may have been piggybacking we may have been piggybacking you may have been piggybacking they may have been piggybacking
Negation
Simple form
I may not piggyback you may not piggyback he may not piggyback we may not piggyback you may not piggyback they may not piggyback
V-ing form
I may not be piggybacking you may not be piggybacking he may not be piggybacking we may not be piggybacking you may not be piggybacking they may not be piggybacking
Perfect
I may not have piggybacked you may not have piggybacked he may not have piggybacked we may not have piggybacked you may not have piggybacked they may not have piggybacked
V-ing perfect
I may not have been piggybacking you may not have been piggybacking he may not have been piggybacking we may not have been piggybacking you may not have been piggybacking they may not have been piggybacking
Interrogative form
Simple form
may I piggyback? may you piggyback? may he piggyback? may we piggyback? may you piggyback? may they piggyback?
V-ing form
may I be piggybacking? may you be piggybacking? may he be piggybacking? may we be piggybacking? may you be piggybacking? may they be piggybacking?
Perfect
may I have piggybacked? may you have piggybacked? may he have piggybacked? may we have piggybacked? may you have piggybacked? may they have piggybacked?
V-ing perfect
may I have been piggybacking? may you have been piggybacking? may he have been piggybacking? may we have been piggybacking? may you have been piggybacking? may they have been piggybacking?
Interro-negative form
Simple form
may I not piggyback? may you not piggyback? may he not piggyback? may we not piggyback? may you not piggyback? may they not piggyback?
V-ing form
may I not be piggybacking? may you not be piggybacking? may he not be piggybacking? may we not be piggybacking? may you not be piggybacking? may they not be piggybacking?
Perfect
may I not have piggybacked? may you not have piggybacked? may he not have piggybacked? may we not have piggybacked? may you not have piggybacked? may they not have piggybacked?
V-ing perfect
may I not have been piggybacking? may you not have been piggybacking? may he not have been piggybacking? may we not have been piggybacking? may you not have been piggybacking? may they not have been piggybacking?