may devitalise
Regular verb: devitalise - devitalised- devitalised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may devitalise
you may devitalise
he may devitalise
we may devitalise
you may devitalise
they may devitalise 	I may be devitalising
you may be devitalising
he may be devitalising
we may be devitalising
you may be devitalising
they may be devitalising	I may have devitalised
you may have devitalised
he may have devitalised
we may have devitalised
you may have devitalised
they may have devitalised	I may have been devitalising
you may have been devitalising
he may have been devitalising
we may have been devitalising
you may have been devitalising
they may have been devitalising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't devitalise
you mayn't devitalise
he mayn't devitalise
we mayn't devitalise
you mayn't devitalise
they mayn't devitalise 	I mayn't be devitalising
you mayn't be devitalising
he mayn't be devitalising
we mayn't be devitalising
you mayn't be devitalising
they mayn't be devitalising	I mayn't have devitalised
you mayn't have devitalised
he mayn't have devitalised
we mayn't have devitalised
you mayn't have devitalised
they mayn't have devitalised	I mayn't have been devitalising
you mayn't have been devitalising
he mayn't have been devitalising
we mayn't have been devitalising
you mayn't have been devitalising
they mayn't have been devitalising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I devitalise?
may you devitalise?
may he devitalise?
may we devitalise?
may you devitalise?
may they devitalise? 	may I be devitalising?
may you be devitalising?
may he be devitalising?
may we be devitalising?
may you be devitalising?
may they be devitalising? 	may I have devitalised?
may you have devitalised?
may he have devitalised?
may we have devitalised?
may you have devitalised?
may they have devitalised? 	may I have been devitalising?
may you have been devitalising?
may he have been devitalising?
may we have been devitalising?
may you have been devitalising?
may they have been devitalising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I devitalise?
mayn't you devitalise?
mayn't he devitalise?
mayn't we devitalise?
mayn't you devitalise?
mayn't they devitalise? 	mayn't I be devitalising?
mayn't you be devitalising?
mayn't he be devitalising?
mayn't we be devitalising?
mayn't you be devitalising?
mayn't they be devitalising? 	mayn't I have devitalised?
mayn't you have devitalised?
mayn't he have devitalised?
mayn't we have devitalised?
mayn't you have devitalised?
mayn't they have devitalised? 	mayn't I have been devitalising?
mayn't you have been devitalising?
mayn't he have been devitalising?
mayn't we have been devitalising?
mayn't you have been devitalising?
mayn't they have been devitalising?