may prefertilise
Regular verb: prefertilise - prefertilised- prefertilised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may prefertilise
you may prefertilise
he may prefertilise
we may prefertilise
you may prefertilise
they may prefertilise 	I may be prefertilising
you may be prefertilising
he may be prefertilising
we may be prefertilising
you may be prefertilising
they may be prefertilising	I may have prefertilised
you may have prefertilised
he may have prefertilised
we may have prefertilised
you may have prefertilised
they may have prefertilised	I may have been prefertilising
you may have been prefertilising
he may have been prefertilising
we may have been prefertilising
you may have been prefertilising
they may have been prefertilising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't prefertilise
you mayn't prefertilise
he mayn't prefertilise
we mayn't prefertilise
you mayn't prefertilise
they mayn't prefertilise 	I mayn't be prefertilising
you mayn't be prefertilising
he mayn't be prefertilising
we mayn't be prefertilising
you mayn't be prefertilising
they mayn't be prefertilising	I mayn't have prefertilised
you mayn't have prefertilised
he mayn't have prefertilised
we mayn't have prefertilised
you mayn't have prefertilised
they mayn't have prefertilised	I mayn't have been prefertilising
you mayn't have been prefertilising
he mayn't have been prefertilising
we mayn't have been prefertilising
you mayn't have been prefertilising
they mayn't have been prefertilising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I prefertilise?
may you prefertilise?
may he prefertilise?
may we prefertilise?
may you prefertilise?
may they prefertilise? 	may I be prefertilising?
may you be prefertilising?
may he be prefertilising?
may we be prefertilising?
may you be prefertilising?
may they be prefertilising? 	may I have prefertilised?
may you have prefertilised?
may he have prefertilised?
may we have prefertilised?
may you have prefertilised?
may they have prefertilised? 	may I have been prefertilising?
may you have been prefertilising?
may he have been prefertilising?
may we have been prefertilising?
may you have been prefertilising?
may they have been prefertilising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I prefertilise?
mayn't you prefertilise?
mayn't he prefertilise?
mayn't we prefertilise?
mayn't you prefertilise?
mayn't they prefertilise? 	mayn't I be prefertilising?
mayn't you be prefertilising?
mayn't he be prefertilising?
mayn't we be prefertilising?
mayn't you be prefertilising?
mayn't they be prefertilising? 	mayn't I have prefertilised?
mayn't you have prefertilised?
mayn't he have prefertilised?
mayn't we have prefertilised?
mayn't you have prefertilised?
mayn't they have prefertilised? 	mayn't I have been prefertilising?
mayn't you have been prefertilising?
mayn't he have been prefertilising?
mayn't we have been prefertilising?
mayn't you have been prefertilising?
mayn't they have been prefertilising?