may dematerialise
Regular verb: dematerialise - dematerialised- dematerialised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may dematerialise
you may dematerialise
he may dematerialise
we may dematerialise
you may dematerialise
they may dematerialise 	I may be dematerialising
you may be dematerialising
he may be dematerialising
we may be dematerialising
you may be dematerialising
they may be dematerialising	I may have dematerialised
you may have dematerialised
he may have dematerialised
we may have dematerialised
you may have dematerialised
they may have dematerialised	I may have been dematerialising
you may have been dematerialising
he may have been dematerialising
we may have been dematerialising
you may have been dematerialising
they may have been dematerialising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't dematerialise
you mayn't dematerialise
he mayn't dematerialise
we mayn't dematerialise
you mayn't dematerialise
they mayn't dematerialise 	I mayn't be dematerialising
you mayn't be dematerialising
he mayn't be dematerialising
we mayn't be dematerialising
you mayn't be dematerialising
they mayn't be dematerialising	I mayn't have dematerialised
you mayn't have dematerialised
he mayn't have dematerialised
we mayn't have dematerialised
you mayn't have dematerialised
they mayn't have dematerialised	I mayn't have been dematerialising
you mayn't have been dematerialising
he mayn't have been dematerialising
we mayn't have been dematerialising
you mayn't have been dematerialising
they mayn't have been dematerialising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I dematerialise?
may you dematerialise?
may he dematerialise?
may we dematerialise?
may you dematerialise?
may they dematerialise? 	may I be dematerialising?
may you be dematerialising?
may he be dematerialising?
may we be dematerialising?
may you be dematerialising?
may they be dematerialising? 	may I have dematerialised?
may you have dematerialised?
may he have dematerialised?
may we have dematerialised?
may you have dematerialised?
may they have dematerialised? 	may I have been dematerialising?
may you have been dematerialising?
may he have been dematerialising?
may we have been dematerialising?
may you have been dematerialising?
may they have been dematerialising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I dematerialise?
mayn't you dematerialise?
mayn't he dematerialise?
mayn't we dematerialise?
mayn't you dematerialise?
mayn't they dematerialise? 	mayn't I be dematerialising?
mayn't you be dematerialising?
mayn't he be dematerialising?
mayn't we be dematerialising?
mayn't you be dematerialising?
mayn't they be dematerialising? 	mayn't I have dematerialised?
mayn't you have dematerialised?
mayn't he have dematerialised?
mayn't we have dematerialised?
mayn't you have dematerialised?
mayn't they have dematerialised? 	mayn't I have been dematerialising?
mayn't you have been dematerialising?
mayn't he have been dematerialising?
mayn't we have been dematerialising?
mayn't you have been dematerialising?
mayn't they have been dematerialising?