may piggyback
Regular verb: piggyback - piggybacked- piggybacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may piggyback
you may piggyback
he may piggyback
we may piggyback
you may piggyback
they may piggyback 	I may be piggybacking
you may be piggybacking
he may be piggybacking
we may be piggybacking
you may be piggybacking
they may be piggybacking	I may have piggybacked
you may have piggybacked
he may have piggybacked
we may have piggybacked
you may have piggybacked
they may have piggybacked	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 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't piggyback
you mayn't piggyback
he mayn't piggyback
we mayn't piggyback
you mayn't piggyback
they mayn't piggyback 	I mayn't be piggybacking
you mayn't be piggybacking
he mayn't be piggybacking
we mayn't be piggybacking
you mayn't be piggybacking
they mayn't be piggybacking	I mayn't have piggybacked
you mayn't have piggybacked
he mayn't have piggybacked
we mayn't have piggybacked
you mayn't have piggybacked
they mayn't have piggybacked	I mayn't have been piggybacking
you mayn't have been piggybacking
he mayn't have been piggybacking
we mayn't have been piggybacking
you mayn't have been piggybacking
they mayn't have been piggybacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I piggyback?
may you piggyback?
may he piggyback?
may we piggyback?
may you piggyback?
may they piggyback? 	may I be piggybacking?
may you be piggybacking?
may he be piggybacking?
may we be piggybacking?
may you be piggybacking?
may they be piggybacking? 	may I have piggybacked?
may you have piggybacked?
may he have piggybacked?
may we have piggybacked?
may you have piggybacked?
may they have piggybacked? 	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 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I piggyback?
mayn't you piggyback?
mayn't he piggyback?
mayn't we piggyback?
mayn't you piggyback?
mayn't they piggyback? 	mayn't I be piggybacking?
mayn't you be piggybacking?
mayn't he be piggybacking?
mayn't we be piggybacking?
mayn't you be piggybacking?
mayn't they be piggybacking? 	mayn't I have piggybacked?
mayn't you have piggybacked?
mayn't he have piggybacked?
mayn't we have piggybacked?
mayn't you have piggybacked?
mayn't they have piggybacked? 	mayn't I have been piggybacking?
mayn't you have been piggybacking?
mayn't he have been piggybacking?
mayn't we have been piggybacking?
mayn't you have been piggybacking?
mayn't they have been piggybacking?