could prefertilise
Verbe régulier : prefertilise - prefertilised- prefertilised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could prefertilise
you could prefertilise
he could prefertilise
we could prefertilise
you could prefertilise
they could prefertilise 	I could be prefertilising
you could be prefertilising
he could be prefertilising
we could be prefertilising
you could be prefertilising
they could be prefertilising	I could have prefertilised
you could have prefertilised
he could have prefertilised
we could have prefertilised
you could have prefertilised
they could have prefertilised	I could have been prefertilising
you could have been prefertilising
he could have been prefertilising
we could have been prefertilising
you could have been prefertilising
they could have been prefertilising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't prefertilise
you couldn't prefertilise
he couldn't prefertilise
we couldn't prefertilise
you couldn't prefertilise
they couldn't prefertilise 	I couldn't be prefertilising
you couldn't be prefertilising
he couldn't be prefertilising
we couldn't be prefertilising
you couldn't be prefertilising
they couldn't be prefertilising	I couldn't have prefertilised
you couldn't have prefertilised
he couldn't have prefertilised
we couldn't have prefertilised
you couldn't have prefertilised
they couldn't have prefertilised	I couldn't have been prefertilising
you couldn't have been prefertilising
he couldn't have been prefertilising
we couldn't have been prefertilising
you couldn't have been prefertilising
they couldn't have been prefertilising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I prefertilise?
could you prefertilise?
could he prefertilise?
could we prefertilise?
could you prefertilise?
could they prefertilise? 	could I be prefertilising?
could you be prefertilising?
could he be prefertilising?
could we be prefertilising?
could you be prefertilising?
could they be prefertilising? 	could I have prefertilised?
could you have prefertilised?
could he have prefertilised?
could we have prefertilised?
could you have prefertilised?
could they have prefertilised? 	could I have been prefertilising?
could you have been prefertilising?
could he have been prefertilising?
could we have been prefertilising?
could you have been prefertilising?
could they have been prefertilising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I prefertilise?
couldn't you prefertilise?
couldn't he prefertilise?
couldn't we prefertilise?
couldn't you prefertilise?
couldn't they prefertilise? 	couldn't I be prefertilising?
couldn't you be prefertilising?
couldn't he be prefertilising?
couldn't we be prefertilising?
couldn't you be prefertilising?
couldn't they be prefertilising? 	couldn't I have prefertilised?
couldn't you have prefertilised?
couldn't he have prefertilised?
couldn't we have prefertilised?
couldn't you have prefertilised?
couldn't they have prefertilised? 	couldn't I have been prefertilising?
couldn't you have been prefertilising?
couldn't he have been prefertilising?
couldn't we have been prefertilising?
couldn't you have been prefertilising?
couldn't they have been prefertilising?