may supplant
Regular verb: supplant - supplanted- supplanted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may supplant
you may supplant
he may supplant
we may supplant
you may supplant
they may supplant 	I may be supplanting
you may be supplanting
he may be supplanting
we may be supplanting
you may be supplanting
they may be supplanting	I may have supplanted
you may have supplanted
he may have supplanted
we may have supplanted
you may have supplanted
they may have supplanted	I may have been supplanting
you may have been supplanting
he may have been supplanting
we may have been supplanting
you may have been supplanting
they may have been supplanting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't supplant
you mayn't supplant
he mayn't supplant
we mayn't supplant
you mayn't supplant
they mayn't supplant 	I mayn't be supplanting
you mayn't be supplanting
he mayn't be supplanting
we mayn't be supplanting
you mayn't be supplanting
they mayn't be supplanting	I mayn't have supplanted
you mayn't have supplanted
he mayn't have supplanted
we mayn't have supplanted
you mayn't have supplanted
they mayn't have supplanted	I mayn't have been supplanting
you mayn't have been supplanting
he mayn't have been supplanting
we mayn't have been supplanting
you mayn't have been supplanting
they mayn't have been supplanting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I supplant?
may you supplant?
may he supplant?
may we supplant?
may you supplant?
may they supplant? 	may I be supplanting?
may you be supplanting?
may he be supplanting?
may we be supplanting?
may you be supplanting?
may they be supplanting? 	may I have supplanted?
may you have supplanted?
may he have supplanted?
may we have supplanted?
may you have supplanted?
may they have supplanted? 	may I have been supplanting?
may you have been supplanting?
may he have been supplanting?
may we have been supplanting?
may you have been supplanting?
may they have been supplanting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I supplant?
mayn't you supplant?
mayn't he supplant?
mayn't we supplant?
mayn't you supplant?
mayn't they supplant? 	mayn't I be supplanting?
mayn't you be supplanting?
mayn't he be supplanting?
mayn't we be supplanting?
mayn't you be supplanting?
mayn't they be supplanting? 	mayn't I have supplanted?
mayn't you have supplanted?
mayn't he have supplanted?
mayn't we have supplanted?
mayn't you have supplanted?
mayn't they have supplanted? 	mayn't I have been supplanting?
mayn't you have been supplanting?
mayn't he have been supplanting?
mayn't we have been supplanting?
mayn't you have been supplanting?
mayn't they have been supplanting?