can prefertilise
Regular verb: prefertilise - prefertilised- prefertilised

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

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

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

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